coelom

(redirected from coeloms)
Also found in: Dictionary, Thesaurus, Encyclopedia.

coelom

 [se´lom]
body cavity, especially the cavity in the mammalian embryo between the somatopleure and splanchnopleure, which is both intra- and extraembryonic; it develops into the pleural, peritoneal, and pericardial cavities. adj., adj coelom´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

coelom

also

celom

(sē′ləm)
n. pl. coeloms or coe·lomata (-lə-mä′tə, -măt′ə)
The fluid-filled cavity within the body of most multicellular animals, except some invertebrates such as flatworms and cnidarians, that lies between the body wall and the digestive tract and is formed by the splitting of the embryonic mesoderm into two layers. Also called body cavity.

coe·lom′ic (sĭ-lŏm′ĭk, -lō′mĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ce·lom

, celoma (sē'lŏm, sē-lō'mă)
1. The cavity between the splanchnic and somatic mesoderm in the embryo.
Synonym(s): coelom, coeloma.
2. Synonym(s): intraembryonic celom
3. Synonym(s): body cavity.
[G. koilōma, a hollow]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Coelomclick for a larger image
Fig. 112 Coelom . Location.

coelom

the main body cavity of most animals with three body layers, being a fluid-filled space between inner and outer layers of MESODERM. The coelom often has tubes connecting to the outside called COELOMODUCTS. In simple animals, e.g. the ANNELIDS, the coelom acts as a store for excretory products and gametes, prior to expulsion to the outside.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
There is, however, an earlier report of internal brooding in an entero-pneust by Gilchrist (1925), who published a drawing of a single advanced larva within the trunk coelom of an adult female of Xenopleura vivipara (family Harrimaniidae).
membranacea migrate into the perivisceral coelom from the peritoneum of the body wall, or funiculus (a network of strand-like elements of the circulatory system), and form syncytial masses of spermatocytes around cytoplasmic masses or cytophores (see Reed, 1991; Franzen, 1998).
membranacea are motile in the paternal coelom, like sperm of other gymnolaemate bryozoans (Marcus, 1938; Silen, 1966; Zimmer and Woollacott, 1974; Temkin, 1994).
The frequency of wave generation was measured in 25 reverse-waveform events for spermatozeugmata within the paternal coelom and calculated as the number of waves per second.
A similar type of coelom formation was documented in echinoid larvae that had been surgically manipulated (reviewed in Horstadius, 1973, and Vickery et al., 2001b).
The segments B1-B5 are formed first, at stage L4, by subdivision of the stage L3 coeloms II and III.
A single coelom forms at the anterior end of the archenteron of 2-day-old elongate gastrulae and grows to occupy most of the anterior preoral region [ILLUSTRATION FOR FIGURE 3B OMITTED].
On days 5-6, the left posterior coelom gives rise to the ventral horn, which grows anteriorly to meet and fuse with the right anterior coelom [ILLUSTRATION FOR FIGURES 3G, H OMITTED].
Prior to spawning, spermatozeugmata move freely within the visceral coelom. Frequently, spermatozeugmata become situated between the body wall and the distomedial side of the pharynx, near the pore that connects the visceral and lophophoral coeloms.
That is, when dishes contain zooids from only one colony, ITOs still permit spawned spermatozeugmata to enter maternal coeloms.
5) show that the magnet is transported within the coelom, or body cavity, of the arm.
Starfish have the ability to transport durable foreign bodies through their coelom (Figs.