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Main body cavity in many animals
The coelom (or celom) is the main body cavity in many animals and is positioned inside the body to surround and contain the digestive tract and other organs
Coelom
Cavity of fluid surrounding an embryo
the embryo. During early embryogenesis, it consists of the extraembryonic coelom, also called the chorionic cavity. The gestational sac is normally contained
Gestational_sac
Terrestrial invertebrate, order Opisthopora
transport system made of coelomic fluid that moves within the fluid-filled coelom and a simple, closed circulatory system, and respire (breathe) via cutaneous
Earthworm
Phylum of marine animals also known as lamp shells
years. Ripe gametes (ova or sperm) float from the gonads into the main coelom and then exit into the mantle cavity. The larvae of inarticulate brachiopods
Brachiopod
Internal space within a multicellular organism
body cavity called the coelom. Mammalian embryos develop two body cavities: the intraembryonic coelom and the extraembryonic coelom (or chorionic cavity)
Body_cavity
Parasitic or predatory annelid worms
their internal segmentation. The body is muscular and relatively solid; the coelom, the spacious body cavity found in other annelids, is reduced to small channels
Leech
Phylum of colonial aquatic invertebrates called moss animals
three-part coelom; radial rather than spiral cleavage in the development of the embryo; and formation of the coelom by enterocoely. However the coelom of ectoproct
Bryozoa
Animals with embryonic bilateral symmetry
primary body cavity derived from the blastocoel, or a secondary cavity, the coelom. Cephalization is a characteristic feature among most bilaterians, where
Bilateria
The intraembryonic coelom or embryonic body cavity is formed during the third week of human embryonic development. The earliest stage of this shows as
Intraembryonic_coelom
Phylum of invertebrate animals
consists of a single muscular "foot". Although molluscs are coelomates, the coelom tends to be small. The main body cavity is a hemocoel through which blood
Mollusca
Phylum of invertebrates with jointed exoskeletons
repeated components. Arthropods come from a lineage of animals that have a coelom, a membrane-lined cavity between the gut and the body wall that accommodates
Arthropod
Clade of animals whose mouth develops before the anus
in several other ways. Secondary body cavities (coeloms) generally form by schizocoely, where the coelom forms out of a solid mass of embryonic tissue splitting
Protostome
Membrane that forms lining of abdominal cavity or coelom
peritoneum is the serous membrane forming the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids. It covers most of
Peritoneum
Topics referred to by the same term
coelom may refer to: Extra-embryonic coelom Intra-embryonic coelom This disambiguation page lists articles associated with the title Embryonic coelom
Embryonic_coelom
Biological kingdom
mouth and an anus, and in the Nephrozoa there is an internal body cavity, a coelom or pseudocoelom. These animals have a head end (anterior) and a tail end
Animal
Digestive tract waste expulsion opening
other important evolutionary developments: the bilaterian body plan, the coelom, and metamerism, in which the body was built of repeated "modules" which
Anus
Flexible skeleton supported by fluid pressure
muscular layers are longitudinal and circular, and part of the fluid-filled coelom within. Contractions of the circular muscles lengthen the organism's body
Hydrostatic_skeleton
Development process of some animals
mesoderm (middle layer) is formed in a developing embryo, in which the coelom appears from pouches growing and separating from the digestive tract (also
Enterocoely
Phylum of animals having a dorsal nerve cord
structuring and movements. Chordates are bilaterally symmetric, possess a coelom and a closed circulatory system, and exhibit metameric segmentation. Although
Chordate
Marine phylum of animals often with radial symmetries
have a haemal coelom, a perivisceral coelom, a gonadal coelom and often also a perihaemal coelom. During development, echinoderm coelom is divided into
Echinoderm
Phylum of segmented worms
Below this are two layers of muscles, which develop from the lining of the coelom (body cavity): circular muscles make a segment longer and slimmer when they
Annelid
Superphylum of protostomes
of organization: the Acoelomata (no coelom), the Pseudocoelomata (partial coelom), and the Eucoelomata (true coelom). Adoutte and coworkers were among
Ecdysozoa
Anatomical structure
lateral plate mesoderm splits into two layers forming the intraembryonic coelom. The outer layer of lateral plate mesoderm adheres to the ectoderm to become
Lateral_plate_mesoderm
Genus of crustaceans
approximately 2,500 m. The genus has cosmopolitan distribution. They parasitize the coelom of asteroids (sea stars). At present, Dendrogaster have been discovered
Dendrogaster
Class of hemichordate invertebrates
Structure of branchial region – bc, coelom. tb, tongue-bars. ds, mesentery. pr, ridge. vv, vessel. gp, gill-pore. dn, dorsal nerve. dv, vessel. œ, oesophagus
Acorn_worm
Superphylum of bilateral animals
well. The deuterostomes are also known as enterocoelomates, because their coelom develops through pouching of the gut, enterocoely. Deuterostomia's sister
Deuterostome
Urinary organ, nonfunctional in mammals
glomera- large embryonic glomeruli. The filtrate is deposited into the coelom. It then passes through thin ciliated tubules into the pronephric nephron
Pronephros
Smooth tissue lining body cavities
function of breathing. The serous cavities are formed from the intraembryonic coelom and are basically an empty space within the body surrounded by serous membrane
Serous_membrane
endoderm, and with it forms the splanchnopleure (mesoderm external to the coelom plus the endoderm). somatopleure mesenchyme This article incorporates text
Splanchnopleure
Projections of the coelom of Asteroidea
papullae), also known as dermal branchiae or skin gills, are projections of the coelom of Asteroidea that serve in respiration and waste removal. Papulae are soft
Papula
Latin-script alphabet consisting of 26 letters
writing for certain words of Greek or Latin origin, such as encyclopædia and cœlom, although such ligatures were not used in either classical Latin or ancient
English_alphabet
Order of arachnids
upper surface. Like other arthropods, spiders are coelomates in which the coelom is reduced to small areas around the reproductive and excretory systems
Spider
Fluid-filled space between the lungs
midline fusion of the trilaminar disc, forms a pair of intraembryonic coeloms anterolaterally around the gut tube during the fourth week, with the splanchnopleure
Pleural_cavity
Hydraulic system in echinoderm anatomy
echinoderms, together with the haemal coelom (or haemal system), perivisceral coelom, gonadal coelom and perihaemal coelom. Other terms sometimes used to refer
Water_vascular_system
anterior extension of the extraembryonic mesoderm and formation of the coelom, the anterior and lateral amniotic folds arise along the ectamnion and grow
Somatopleure
Class of unsegmented annelids
an inner layer of longitudinal musculature. The body wall surrounds the coelom (body cavity) that is filled with fluid on which the body wall musculature
Sipuncula
Superorder of cephalopod molluscs
fluid-filled receptacle, equivalent to the swim bladder of a fish, in the coelom or connective tissue. This reservoir acts as a chemical buoyancy chamber
Squid
Genus of intracellular parasites
Goodrich 1950 – coelom of sipunculid worm Sipunculus nudus. U. holothuriae (Schneider 1858 as Gregarina) Trégouboff 1918 – blood vessels, coelom and intestine
Urospora_(alveolate)
Phylum of marine animals
main coelom's fluid. Two metanephridia, each with a funnel-like intake, filter the fluid a second time, returning any useful products to the coelom and
Phoronid
Paired internal organ in vertebrates
directly to the coelom, in the more advanced pronephros they are filtered into the nephrocoel, which is a cavity adjacent to the coelom. The coelom is connected
Kidney_(vertebrates)
Class of echinoderms
characteristics which help to identify different species. Inside the body wall is the coelom which is divided by three longitudinal mesenteries which surround and support
Sea_cucumber
Class of marine invertebrates
However, the main circulatory fluid fills the general body cavity, or coelom. This coelomic fluid contains phagocytic coelomocytes, which move through
Sea_urchin
Cells formed during embryonic development
which ultimately coalesce to form the chorionic cavity (extraembryonic coelom). "The Second week of Life". "Chorion Bilayer - Cellular Development, Function
Heuser's_membrane
Phylum of aquatic invertebrates
colonial species have thicker cuticles, stiffened with chitin. There is no coelom (internal fluid-filled cavity lined with peritoneum) and the other internal
Entoprocta
Development process of some animals
develop. The schizocoely mechanism occurs when secondary body cavities (coeloms) are formed by splitting a solid mass of mesodermal embryonic tissue. All
Schizocoely
Genus of worms
each with its own coelom. There is a specialist feeding structure, the lophophore, which is an extension of the wall of the coelom and is surrounded by
Phoronis
Excretory organ similar to vertebrate kidney
functionally integrated with coelomoducts—mesodermal structures that open from the coelom to the exterior—to form a more complex structure known as a nephromixium
Nephridium
Class of echinoderms, marine animal
disappear while others become the water vascular system and the visceral coelom. The starfish is now pentaradially symmetrical. It casts off its stalk and
Starfish
Class of echinoderms
number of pores to the coelom (body cavity). The main fluid reservoir is the muscular-walled ring canal that is connected to the coelom by stone canals lined
Crinoid
Phylum of animals
based on their superficial similarities. Like flatworms, they do not have a coelom and are dorsoventrally flattened. With the advent of phylogenetics, Xenoturbella
Xenacoelomorpha
funnel-like component of a metanephridium. It is always oriented towards the coelom. The nephrostome is covered from the inside with cilia, which push the water
Nephrostome
Species of fish
eel-like fish in the family Carapidae. This pearlfish lives inside the coelom of sea cucumbers such as Bohadschia argus, Thelenota ananas , and Stichopus
Silver_pearlfish
Membrane lining the lungs and the thoracic cavity wall
cavity on each side. These cavities then open up into the extraembryonic coelom. During the fourth week, with the ventral infolding and the subsequent midline
Pleura
Subphylum of arthropods
segments that fuse during the development of the embryo; a much reduced coelom; a hemocoel through which the blood circulates, driven by a tube-like heart
Chelicerata
Middle germ layer of embryonic development
mesoderm forms mesenchyme, mesothelium and coelomocytes. Mesothelium lines coeloms. Mesoderm forms the muscles in a process known as myogenesis, septa (cross-wise
Mesoderm
phagocytic leukocyte that appears in the bodies of animals that have a coelom. In most, it attacks and digests invading organisms such as bacteria and
Coelomocyte
Membrane inside the body cavity of an animal
complete or incomplete partitions of the body cavity, whether that is the coelom or, as in the Anthozoa, the gastrovascular cavity. The word "mesentery"
Mesentery_(zoology)
thus peristalsis) and, in the Nephrozoa, nephridia (kidney precursors), coelom (or maybe pseudocoelom), distinct mouth and anus (evolution of through-gut)
Timeline_of_human_evolution
Animals without a vertebral column
the Kinorhyncha, Priapulida, and Loricifera. These groups have a reduced coelom, called a pseudocoelom. Other invertebrates include the Nemertea, or ribbon
Invertebrate
Abnormal exit of tissues or organs from the cavity they usually reside in
referring to the retraction of the intestine from the extra-embryonal navel coelom into the abdomen in the healthy embryo at about 71⁄2 weeks. Various types
Hernia
Order of flatworms
(tapeworms). Members of this order are parasites of vertebrates, living in the coelom (the body cavity). Gyrocotylidea are a subspecies of the tapeworm that is
Gyrocotylidea
Primary layer of cells in embryonic development
of a mesoderm leads to the development of the coelom, the main body cavity. Organs formed inside a coelom can freely move, grow, and develop independently
Germ_layer
German zoologist (1850–1937)
together and performed embryological studies, especially on the theory of the coelom (1881). These problems were based on the phylogenetic theorems of Haeckel
Richard_Hertwig
Class of annelid worms
muscle, a layer of longitudinal muscle, and a peritoneum surrounding the coelom (body cavity). Additional oblique muscles move the parapodia. In most species
Polychaete
Organ containing endosymbionts
bacteria that provide food for their host. Trophosomes are contained by the coelom of tube worms (family Siboglinidae, e.g. the giant tube worm Riftia pachyptila)
Trophosome
Phylum of soft-bodied invertebrates
body cavity, so are described as acoelomates, although the absence of a coelom also occurs in other bilaterians such as gnathostomulids, gastrotrichs,
Flatworm
Family of roundworms
Drilonemidae is a family of parasites that inhabit the coeloms of earthworms. Drilonematidae is a family of nematodes in the order of Spirurida. They
Drilonematidae
English zoologist (1868–1946)
great works of vertebrate comparative anatomy. Goodrich E.S. 1895. On the coelom, genital ducts, and nephridia. Q.J.M.S. 37, 477–510. Goodrich E.S. 1913
Edwin_Stephen_Goodrich
Star-shaped organisms
amongst the epidermal tissue and coelom outgrowths (radial water canal and radial nerve cord). Moreover, the perivisceral coelom funnels undifferentiated cells
Starfish_regeneration
Body cavity in the abdominal area
fighting abscesses; however, external drainage is usually required also. Coelom "Abdominal cavity". Encyclopædia Britannica. Vol. I: A-Ak – Bayes (15th ed
Abdominal_cavity
Phylum of invertebrate animals
haemocoel. Unlike a true coelom, a pseudocoel is not fully enclosed by a cell layer derived from the embryonic mesoderm. A coelom is, however, formed around
Onychophora
Embryonic cell structure
which ultimately coalesce to form the chorionic cavity (extraembryonic coelom). The one-celled zygote, a eukaryotic cell formed by a fertilization event
Bilaminar_embryonic_disc
Genus of deep-sea sea cucumbers known as sea pigs
to other echinoderms, except the madreporite opens in the perivisceral coelom instead of in the external body wall. Like other holothuroids, Scotoplanes
Scotoplanes
Genus of gastropods
mollusks in the family Eulimidae. These small snails live in the perivisceral coelom of sea cucumbers. Species within this genus include the following: Entoconcha
Entoconcha
anterior coeloms are known as axocoel, the medial ones as hydrocoel and the posterior ones as somatocoels. In extant echinoderm larva, the coeloms on the
Dipleurula
Animals that feed by straining food from water
digested, mainly within the cells. Nutrients are transported throughout the coelom, including the mantle lobes, by cilia. The waste produced by metabolism
Filter_feeder
Organisms that live in salt water
the mouth and the anus. Around the gut it has an internal body cavity, a coelom or pseudocoelom. Animals with this bilaterally symmetric body plan have
Marine_life
Membrane lining body cavities
Mesothelium derives from the embryonic mesoderm cell layer, that lines the coelom (body cavity) in the embryo. It develops into the layer of cells that covers
Mesothelium
Group of marine animals ("spoon worms")
green Listriolobus pelodes. The body wall is muscular. It surrounds a large coelom which leads to a long looped intestine with an anus at the rear tip of the
Echiura
Biological term for a wall dividing a cavity or structure
plates in the corallites of a coral. Annelids have septa that divide their coelom into segmented chambers. Many shelled organisms have septa subdividing their
Septum
Early bilaterian organism fossil species
muscles against the animal's hydrostatic skeleton, and may have possessed a coelom, mouth, anus, and through-gut, in a similar way to a worm. The authors of
Ikaria_(genus)
Class of flatworms
and gyrocotylids (which burrow through the gut or body wall to reach the coelom) are intestinal, though some life cycle stages rest in muscle or other tissues
Cestoda
All Latin and Greek roots beginning with G
κόχλος (kókhlos) cochlea coel- hollow Greek κοῖλος (koîlos) blastocoel, coelom, coelomate, coelomic, enterocoely, pseudocoelomate, sarcocele, schizocoelomate
List of Greek and Latin roots in English/A–G
List_of_Greek_and_Latin_roots_in_English/A–G
Double layer of peritoneum in the abdomen
abdominal wall Peritoneum – Membrane that forms lining of abdominal cavity or coelom This article incorporates text in the public domain from page 1156 of the
Lesser_omentum
Second stage of larval development in starfishes
forms on the right side, which becomes the upper, or aboral, surface. The coelom, or body cavity is divided into three chambers in the larva, two of which
Brachiolaria
Period of major evolutionary diversification of animal life
stem group relative to the arthropods. Skin (ectoderm) Muscle (mesoderm) Coelom Internal organ Membrane (peritoneum) Gut (endoderm) The term Triploblastic
Cambrian_explosion
Membranous sac attached to an embryo
formed when the extraembryonic mesoderm separates to form the extraembryonic coelom; cells from the mesoderm pinch off an area of the yolk sac, and what remains
Yolk_sac
Division of some animal and plant body plans into a series of segments
of the traits all of the time: many lack segmentation in the body wall, coelom and musculature. Although perhaps not as well understood as Drosophila,
Segmentation_(biology)
extends into the tissue of the lateral pillars of the cord bounding the coelom. When the myotomic downgrowths reach the ventral aspect, their anterior
Umbilical_ring
Family of peanut worms
crescent-shape made of an enclosed nuchal organ. It has a canal of sacs in the coelom, lying in a continuous band. The anal and caudal shield (at the anterior
Aspidosiphonidae
Development and formation of the human embryo
which ultimately coalesce to form the chorionic cavity (extraembryonic coelom). The primitive streak, a linear collection of cells formed by the migrating
Human_embryonic_development
Family of annelids
buoyancy they have a large body cavity (coelom) filled with body fluid of a density similar to seawater. With the coelom taking up much of the inner space,
Tomopteridae
Reproductive physiology of fishes
oviduct and are eliminated. Secondary gymnovarian ovaries shed ova into the coelom from which they go directly into the oviduct. In the third type, the oocytes
Fish_reproduction
Class of eel-shaped, slime-producing animal
with the coelom, providing lubrication. The single testicle or ovary has no transportation duct. Instead, the gametes are released into the coelom until
Hagfish
The formation of a mesoderm led to the formation of a coelom. Organs formed inside a coelom can freely move, grow, and develop independently of the
Histogenesis
Type of elongated, flagellated cells
as vascular fluid within the ligamentum denticulatum may travel into the coelom through the narrow network of solenocyte gaps or foot processes. In regards
Solenocyte
Phase of embryonic development
This transition allows them to migrate to other areas of the embryo. The coelom of the body forms from a split of the mesoderm along the somite axis. Organogenesis
Organogenesis
Innermost membranous sac that surrounds and protects a developing embryo
to the chorion's inner surface, so that the extra-embryonic part of the coelom is obliterated. The amniotic fluid increases in quantity up to the sixth
Amnion
Species of annelid worm
means. Most worms are either male or female and the gametes mature in the coelom before being released into the water column. Some specimens, particularly
Sabellastarte_spectabilis
Fish species with oils in their tissues and coelom
Fish species with oils in their tissues and coelom
Oily_fish
COELOM
COELOM
COELOM
COELOM
Boy/Male
Arabic, French, German, Gujarati, Hindu, Indian, Malaysian, Muslim, Turkish
Proof; Evidence
Boy/Male
Sikh
In appreciation of God, Praise of God
Girl/Female
American, British, Christian, English, French, German, Italian, Latin, Spanish, Swedish
Little and Womanly; Tiny and Feminine; Carl; Female Version of Charles Manly; Man Warrior; Pure
Girl/Female
Hindu, Indian
Light Green Colour; Light Green
Female
English
Hungarian form of English Edith, EDIT means "rich battle."
Boy/Male
Bengali, Indian
Evening Time Prayer
Boy/Male
Arabic, Muslim
Excess
Girl/Female
Indian
God of Love
Girl/Female
Bengali, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Telugu
Brightest Flame
Boy/Male
Arabic, French, Hindu, Indian, Muslim, Sindhi
He who Smiles a Lot; Smiling
COELOM
COELOM
COELOM
COELOM
COELOM