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Outer germ layer of embryonic development
The ectoderm is one of the three primary germ layers formed in early embryonic development. It is the outermost layer, and is superficial to the mesoderm
Ectoderm
Primary layer of cells in embryonic development
ectoderm and an endoderm, and are known as diploblasts. But most animals have a bilateral symmetry, and develop from three germ layers, an ectoderm,
Germ_layer
Embryonic cell structure
bilaminar disc of two layers, an upper layer called the epiblast (primitive ectoderm) and a lower layer called the hypoblast (primitive endoderm), which will
Bilaminar_embryonic_disc
Innermost membranous sac that surrounds and protects a developing embryo
extra-embryonic somatic mesoderm on the outer side and the extra-embryonic ectoderm or trophoblast on the inner side. Etymologists have traditionally assumed
Amnion
Cells that give rise to the embryo in amniote development
amniote embryonic development, the epiblast (also known as the primitive ectoderm) is one of two distinct cell layers arising from the inner cell mass in
Epiblast
Embryonic division of the ectoderm
surface ectoderm, AKA external ectoderm, is one of the two early embryonic divisions of the ectoderm. The other early division of the ectoderm is the neuroectoderm
Surface_ectoderm
Inner germ layer of embryonic development
primary germ layers in the very early embryo. The other two layers are the ectoderm (outside layer) and mesoderm (middle layer). Cells migrating inward along
Endoderm
Phase of embryonic development
During organogenesis, the three germ layers formed from gastrulation (the ectoderm, endoderm, and mesoderm) form the tissues and internal organs of the organism
Organogenesis
constituents of three primary germ layers, the endoderm, mesoderm, and ectoderm. The science of the microscopic structures of the tissues formed within
Histogenesis
Formation of the eye during embryonic development
eye. Specifically, the eye is derived from the neuroepithelium, surface ectoderm, and the extracellular mesenchyme which consists of both the neural crest
Eye_development
Stage in embryonic development
laevis, the specification of the three germ layers (endoderm, mesoderm and ectoderm) occurs at the blastula stage. Great efforts have been made to determine
Ectoderm_specification
Development and formation of the human embryo
the hindgut. The lower part (one-third) is derived from ectoderm around the proctodeum. Ectoderm, in the region of the proctodeum on the surface of part
Human_embryonic_development
Process by which animal embryos form and develop
larva). The egg cell is generally asymmetric, having an animal pole (future ectoderm). It is covered with protective envelopes, with different layers. The first
Animal_embryonic_development
Processes which grow and shape an organism's nervous tissue over its lifetime(s)
vertebrates, it begins with the formation of the neural tube from the ectoderm via neurulation. This tube then differentiates into the brain and spinal
Development of the nervous system
Development_of_the_nervous_system
Anatomical structure
mesoderm is the middle layer of the three germ layers, between the outer ectoderm and inner endoderm. During the third week of embryonic development the
Lateral_plate_mesoderm
Organ of hearing and balance
develop in the early embryo called otic placodes, which are derived from the ectoderm. The ear may be affected by disease, including infection and traumatic
Ear
ectoderm, and with it (partially) forms the somatopleure. The inner layer forms the splanchnopleure. The somatopleure as the combination of ectoderm and
Somatopleure
Embryological process forming the neural tube
induces the formation of the central nervous system (CNS) by signaling the ectoderm germ layer above it to form the thick and flat neural plate. The neural
Neurulation
Embryologic stage in which germ layers form
cells differentiate into the ectoderm. In diploblastic organisms, such as Cnidaria and Ctenophora, the gastrula has only ectoderm and endoderm. The two layers
Gastrulation
Structure in an embryo which will become the nervous system
ectoderm to differentiate into skin cells. Without BMP4 the ectoderm cells would develop into neural cells. Axial mesoderm cells under the ectoderm secrete
Neural_plate
One of two forms found in the phylum Cnidaria (zoology)
layer is known technically as the ectoderm, with the inner layer as the endoderm (or gastroderm). Between ectoderm and endoderm is a supporting layer
Polyp_(zoology)
Medical condition
of the membranous neurocranium with normal placement of the embryonic ectoderm, resulting in the absence of the calvaria, but with an intact layer of
Acalvaria
Endocrine gland of the brain
pituitary lobe (adenohypophysis) arises from an evagination of the oral ectoderm (Rathke's pouch). This contrasts with the posterior pituitary, which originates
Pituitary_gland
Division of the forebrain around the third ventricle
During the third week of development a neural tube is created from the ectoderm, one of the three primary germ layers, and forms three main vesicles: the
Diencephalon
State of having two germ layers in embryonic development
condition of the early embryo in which there are two primary germ layers: the ectoderm and endoderm. Diploblasts are the organisms which develop with two germ
Diploblasty
Middle germ layer of embryonic development
early development of the embryo of most animals. The outer layer is the ectoderm, and the inner layer is the endoderm. The mesoderm forms mesenchyme, mesothelium
Mesoderm
Structure arising during embryonic development of birds and mammals
from the neural plate, a preliminary structure consisting of elongated ectoderm cells. The folds give rise to neural crest cells, as well as bringing about
Neural_fold
secretion Salivary gland mucous cell Exocrine secretory epithelial cells Ectoderm Salivary gland serous cell Von Ebner's gland cell in tongue (washes taste
List_of_human_cell_types
System describing embryonic development
the blastocystic cavity. syncytiotrophoblast cytotrophoblast amniotic ectoderm implantation bilaminar embryonic disc primary yolk sac amniotic cavity
Carnegie_stages
list of cells in humans derived from the three embryonic germ layers – ectoderm, mesoderm, and endoderm. Trichocyte Keratinocyte Gonadotrope Corticotrope
List of human cell types derived from the germ layers
List_of_human_cell_types_derived_from_the_germ_layers
Development in 3rd to 8th week of gestation
give rise to the future head and neck. They consist of three layers, the ectoderm, mesoderm and endoderm, which form the mesenchyme (derived from the lateral
Face and neck development of the human embryo
Face_and_neck_development_of_the_human_embryo
Kingdom of life
gastrula with a digestive chamber and two separate germ layers, an external ectoderm and an internal endoderm. In most cases, a third germ layer, the mesoderm
Animal
During the fourth week of embryonic development, an area of thickened ectoderm develops, on each side of the frontonasal process called the nasal placodes
Frontonasal_process
Thickened tissue in an embryo which gives rise to neural structures
placode is an area of thickening of the epithelium in the embryonic head ectoderm layer that gives rise to neurons and other structures of the sensory nervous
Neurogenic_placode
Chordate neural structure
formed from clustered neuronal differentiation at the axial region of the ectoderm, known as the neural plate. During embryonic development, the neural plate
Dorsal_nerve_cord
Colored part of an eye
eye (iris labeled at upper right) Details Precursor Mesoderm and neural ectoderm Part of Front of eye System Visual system Artery Long posterior ciliary
Iris_(anatomy)
Endocrine gland in the brain of most vertebrates
modern lizards and tuataras form together from a pocket formed in the brain ectoderm. The loss of parietal eyes in many living tetrapods is supported by developmental
Pineal_gland
anterior/posterior axis. Limb bud is undifferentiated mesenchyme enclosed by an ectoderm covering. Eventually, the limb bud develops into bones, tendons, muscles
Zone_of_polarizing_activity
Period of reproduction
the fetus, the ectoderm, mesoderm, and endoderm, develop. The narrow line of cells begin to form the endoderm and mesoderm. The ectoderm begins to grow
Pregnancy_(mammals)
Study of the structure of organisms
Those simpler invertebrates which are formed from two germ layers of ectoderm and endoderm are called diploblastic and the more developed animals whose
Anatomy
Depression between the brain and the pericardium in an embryo
Stomodeum labeled in upper right. Details Carnegie stage 9 Precursor Surface ectoderm Gives rise to Mouth and anterior pituitary Identifiers Latin stomodeum
Stomodeum
Internal space within a multicellular organism
is a fold of one of the layers of the trilaminar germ disc, called the ectoderm, appears. This layer elevates and closes dorsally, while the gut tube rolls
Body_cavity
pharyngeal groove (or branchial groove, or pharyngeal cleft) is made up of ectoderm unlike its counterpart the pharyngeal pouch on the endodermal side. The
Pharyngeal_groove
Feature of a developing embryo from which the ear develops
In embryology, the otic placode is a thickening of the ectoderm on the outer surface of a developing embryo from which the ear develops. The ear, including
Otic_placode
Mechanisms that form the endocrine system
mesoderm. In contrast, endocrine glands that arise from the endoderm and ectoderm produce the amine, peptide, and protein hormones. The fetal adrenal cortex
Development of the endocrine system
Development_of_the_endocrine_system
Cancer of epithelial cells with glandular origin or characteristics
Epithelial tissue can be derived embryologically from any of the germ layers (ectoderm, endoderm, or mesoderm). To be classified as adenocarcinoma, the cells
Adenocarcinoma
Multicellular diploid eukaryote in its earliest stage of development
triploblastic animals, the three germinal layers that form are called the ectoderm, mesoderm, and endoderm. All tissues and organs of a mature animal can
Embryo
Tissue lining the surfaces of organs in animals
integument, or external "skin", consists of a single layer of epithelial ectoderm from which arises the cuticle, an outer covering of chitin, the rigidity
Epithelium
Hard structure of the mouth
and hardness that originate from the outermost embryonic germ layer, the ectoderm. The general structure of teeth is similar across the vertebrates, although
Tooth
Structure in the embryo
the anterior by the cloacal membrane, formed by the apposition of the ectoderm and endoderm, and reaching, at first, as far forward as the future umbilicus
Cloaca_(embryology)
Pluripotent embryonic cell group giving rise to diverse cell lineages
ridge-like structure that is formed transiently between the epidermal ectoderm and neural plate during vertebrate development. Neural crest cells originate
Neural_crest
The region where the crescentic masses of the ectoderm and endoderm come into direct contact with each other constitutes a thin membrane, the buccopharyngeal
Buccopharyngeal_membrane
Sac that protrudes from the embryonic forebrain to form each eye
vesicles suggest that the surrounding extraocular tissues – the surface ectoderm and extraocular mesenchyme – are necessary for normal eye growth and differentiation
Optic_vesicle
Shallow median groove of the neural plate between the neural folds of an embryo
between the neural folds of an embryo. The neural plate is a thick sheet of ectoderm surrounded on either side by the neural folds, two longitudinal ridges
Neural_groove
Animals with embryonic bilateral symmetry
embryos are triploblastic, having three germ layers: endoderm, mesoderm and ectoderm, and have complete digestive tracts with a separate mouth and anus. Some
Bilateria
Branching network of vessels or nerves
symmetric echinoderms also take this form, where a plexus underlies the ectoderm of these animals and deeper in the body other nerve cells form plexuses
Plexus
Exocrine gland in humans and other mammals
Skin Details Precursor Mesoderm (blood vessels and connective tissue) Ectoderm (cellular elements) Artery Internal thoracic artery Lateral thoracic artery
Mammary_gland
Branch of biology, studying prenatal biology
three distinct layers of cells (the germ layers, endoderm, mesoderm and ectoderm); from them all the bodily organs and tissues subsequently arise. The innermost
Embryology
formation, where the tips of the blastoderm begins the formation of the ectoderm, mesoderm, and endoderm. The blastoderm is formed when the oocyte plasma
Blastoderm
Sensory organ of vision
ectoderm. The lens and the epithelium of the cornea arise from the surface ectoderm directly; other structures come from either the neural ectoderm or
Human_eye
Clear, colorless bodily fluid found in the brain and spinal cord
affect the transformation of the overlying ectoderm into nervous tissue. The neural tube, forming from the ectoderm, contains CSF prior to the development
Cerebrospinal_fluid
Brain structure
(Hematoxylin and Eosin stained section, 100x magnification) Details Precursor ectoderm Identifiers TA98 A05.1.01.016 TA2 2142 FMA 77270 Anatomical terminology
Juxtaoral_organ_of_Chievitz
Origination and development of an organism
After the neural crest closes, the neural crest cells and ectoderm cells separate and the ectoderm becomes the epidermis surrounding this complex. The neural
Ontogeny
Embryonic inner cell mass tissue that forms the yolk sac and, later, chorion
mass, the epiblast, differentiates into the three primary germ layers, ectoderm, mesoderm, and endoderm. The hypoblast lies beneath the epiblast and consists
Hypoblast
Type of germ cell tumor
structures characteristic of normal skin and other tissues derived from the ectoderm. The term is most often applied to teratoma on the skull sutures and in
Teratoma
Study of how organisms develop and grow
Morphogenesis is important for creating the three germ layers of the early embryo (ectoderm, mesoderm, and endoderm) and for building up complex structures during
Developmental_biology
Structure formed early in vertebrate limb development
in vertebrate limb development. As a result of interactions between the ectoderm and underlying mesoderm, formation occurs roughly around the fourth week
Limb_bud
Group of genetic conditions affecting the embryonic ectoderm
development or function of two or more structures that originate from the ectoderm, the outer layer of an embryo. These structures include hair, teeth, nails
Ectodermal_dysplasia
Early embryonic structure that gives rise to the placenta
the embryo. After blastulation, the trophoblast is contiguous with the ectoderm of the embryo and is referred to as the trophectoderm. After the first
Trophoblast
Phylum of marine deuterostome animals
gastrulation. The animal mesomeres of P. flava go on to give rise to the larva's ectoderm, animal blastomeres also appear to give rise to these structures though
Hemichordate
Protein found in humans
hemisphere of cerebellum Top expressed in adrenal gland neural layer of retina ectoderm otic vesicle saccule otic placode Gonadal ridge cumulus cell superior frontal
Adrenodoxin_reductase
Type of DNA sequence
All of these alterations can be traced to an improper patterning of the ectoderm during Xenopus development. Thus, a mutation or alteration in either the
Silencer_(genetics)
German quack physician (1935–2017)
functional impairment—with the embryonic germ layer (endoderm, mesoderm or ectoderm) from which both the organ tissues and the corresponding brain regions
Ryke_Geerd_Hamer
Medical condition
thickened surface ectoderm (lens placodes). (C) The interaction between the optic vesicle and the lens placode of the surface ectoderm results in optic
Sclerocornea
Marine invertebrates of the subphylum Anthozoa
The outer layer is known technically as the ectoderm, the inner layer as the endoderm. Between ectoderm and endoderm is a supporting layer of gelatinous
Coral
Mechanisms that form the digestive system in the human embryo
is a fold of one of the layers of the trilaminar germ disc, called the ectoderm, appears. This layer elevates and closes dorsally, while the gut tube rolls
Development of the human digestive system
Development_of_the_human_digestive_system
Rejected phylum of animals
They have very simple tissue organization, with only two layers of cells (ectoderm and endoderm), along with a middle undifferentiated layer called the mesoglea
Coelenterata
Disease affecting a small percentage of the population
conferences on selected groups of diseases (for example on diseases of ectoderm) or rare diseases in general (e.g. European Conference on Rare Diseases
Rare_disease
Genus of worms
one-way digestive tract, with a pseudocoelom (body cavity made up of only an ectoderm and endoderm). The genus was first recognised in a larval form in 1835
Trichinella
Cavities within the human brain
of cells called ectoderm. In the middle of the dorsal surface of the embryo is a linear structure called the notochord. As the ectoderm proliferates, the
Ventricular_system
Any medical condition that affects the integumentary system
pili muscle. In the embryo, the epidermis, hair, and glands are from the ectoderm, which is chemically influenced by the underlying mesoderm that forms the
Skin_condition
Smooth tissue lining body cavities
embryo. The trilaminar embryo consists of three relatively flat layers of ectoderm, endoderm, and mesoderm. As the embryo develops, the mesoderm starts to
Serous_membrane
the development of the urinary and reproductive organs. It is formed by ectoderm and endoderm coming into contact with each other. As the human embryo grows
Cloacal_membrane
Embryonic tissue giving rise to olfactory epithelium
olfactory epithelium of the nose. Two nasal placodes arise as thickened ectoderm from the frontonasal process. They give rise to the nose, the philtrum
Nasal_placode
All Latin and Greek roots beginning with E
ecology, economics, economy, ecumenism ecto- outside Greek ἐκτός (ektós) ectoderm, ectoparasite, ectotherm ed-, es- eat Latin edere, esus comedo, comestible
List of Greek and Latin roots in English/E
List_of_Greek_and_Latin_roots_in_English/E
Band of epithelial tissue
when cells of the oral ectoderm proliferate faster than cells of other areas. Best described as an in-growth of oral ectoderm, the dental lamina is frequently
Dental_lamina
Fungus infection of the skin
(2018). Expert Consensus on The Management of Dermatophytosis in India (ECTODERM India). BMC dermatology, 18(1), 6. [2] Hayette, M.-P., & Sacheli, R. (2015)
Dermatophytosis
Protein-coding gene in the species Homo sapiens
zone mandibular prominence endocardial cushion abdominal wall germ layer ectoderm More reference expression data BioGPS More reference expression data Gene
Replication_protein_A2
Phylum of aquatic animals
seen today. Consequently, these are analogous, but not homologous, to ectoderm and endoderm – the "external" and "internal" cell layers in eumetazoans
Placozoa
Mechanisms that form the reproductive system
In the outer part of the intermediate mesoderm, immediately under the ectoderm, in the region from the fifth cervical segment to the third thoracic segment
Development of the reproductive system
Development_of_the_reproductive_system
Medical condition
layers, the ectoderm and the mesoderm. In the early embryo, these cell layers form the basis for many of the body's organs and tissues. Ectoderm-mesoderm
Hypohidrotic ectodermal dysplasia
Hypohidrotic_ectodermal_dysplasia
Development process of some animals
phase of development. At this point, there are two layers of cells: the ectoderm (outermost) and the endoderm (innermost) layers. The mesoderm begins to
Enterocoely
Developmental precursor to the central nervous system
neurulation and secondary neurulation. Primary neurulation divides the ectoderm into three cell types: The internally located neural tube The externally
Neural_tube
disc. It is an embryo which exists as three different germ layers – the ectoderm, the mesoderm and the endoderm. These layers are arranged on top of each
Trilaminar_embryonic_disc
Mesoderm
the notochord itself but also in inducing development of the overlying ectoderm into the neural tube will eventually induce the formation of vertebral
Axial_mesoderm
Congenital defect
consists of three layers, the outer ectoderm and inner endoderm separated by a middle layer called the mesoderm. The ectoderm gives rise to skin and the CNS
Omphalocele
Main body cavity in many animals
mesoderm splits into two layers: the first attaches to the body wall or ectoderm, forming the parietal layer and the second surrounds the endoderm or alimentary
Coelom
Protein-coding gene in the species Homo sapiens
choroid plexus skin of thigh cerebellar vermis Top expressed in saccule ectoderm otic vesicle otic placode spermatid Epithelium of choroid plexus neural
LMBRD1
the intermediate mesoderm, the lateral plate mesoderm and the surface ectoderm. FGF8 in the intermediate mesoderm signals to the lateral mesoderm, restricting
Apical_ectodermal_ridge
American embryologist and academic
view - plays a role equivalent to that of the endoderm, mesoderm, and ectoderm of bilaterian development and is a definitive feature of vertebrates (as
Brian_K._Hall
ECTODERM
ECTODERM
ECTODERM
ECTODERM
Boy/Male
Bengali, Hindu, Indian, Sanskrit
Heart Beat
Boy/Male
Hindu, Indian
River
Boy/Male
Indian
Hight
Girl/Female
American, Christian, French, German
Noble; Variant of Adela
Boy/Male
Tamil
Love
Surname or Lastname
English
English : habitational name from a place in Staffordshire called Rawnsley.
Boy/Male
Hindu
Wealthy
Boy/Male
Greek
All seeing.
Girl/Female
Indian, Modern, Telugu
First Letter of Parent Name
Girl/Female
Greek
Christian.
ECTODERM
ECTODERM
ECTODERM
ECTODERM
ECTODERM
n.
The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm.
n.
The ectoderm of a sponge.
n.
A suffix or terminal formative, much used in anatomical terms, and signifying skin, integument, covering; as, blastoderm, ectoderm, etc.
n.
The outer layer of the blastoderm; epiblast.
a.
Relating to, or connected with, the two primitive germ layers, the ectoderm and ectoderm; as, the "ectental line" or line of juncture of the two layers in the segmentation of the ovum.
n.
One of the primitive masses, or segments, into which the mesoblast of the vertebrate embryo breaks up on either side of the anterior part of the notochord; a mesoblastic, or protovertebral, somite. See Illust. of Ectoderm.
a.
Of or pertaining to both the neuron and the enteron; as, the neurenteric canal, which, in embroys of many vertebrates, connects the medullary tube and the primitive intestine. See Illust. of Ectoderm.
n.
The outer layer of the blastoderm; the ectoderm. See Blastoderm, Delamination.
n.
A thin gelatinous tissue separating the ectoderm and endoderm in certain coelenterates.
a.
Of or relating to the ectoderm.
n.
An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebrae and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.
n.
The outer layer of the blastoderm; the epiblast; the ectoderm.
n.
The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of Blastoderm.
a.
Alt. of Ectodermic
n. pl.
Those animals in which the protoplasmic mass, constituting the egg, is converted into a multitude of cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa.
n.
The inner or lower layer of the blastoderm; -- called also endoderm, entoderm, and sometimes hypoderm. See Illust. of Blastoderm, Delamination, and Ectoderm.
n.
The innermost layer of the blastoderm and the structures derived from it; the hypoblast; the entoblast. See Illust. of Ectoderm.