body cavity The internal cavity of the body of an animal, which is present in most invertebrates and all vertebrates and contains the major organs. The body cavity of vertebrates and many invertebrates is the coelom. In vertebrates the body cavity is divided by a transverse septum just posterior to the heart into the abdominal and thoracic cavities (see abdomen; thorax). In mammals the septum is the diaphragm.
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, noddy, Passamaquoddy, shoddy, Soddy, squaddie, toddy, wadi • , tody •body, embody, Irrawaddy, Kirkcaldy, noddy, Passamaquoddy, shoddy, Soddy, squaddie, toddy, wadi •secondi, spondee, tondi •anybody • everybody •… Metameric Segmentation , metameric segmentation The repetition of organs and tissues at intervals along the body of an animal, thus dividing the body into a linear series of… Astral Body , An exact replica of the physical body but composed of finer matter. The term is chiefly employed in Theosophy, and those numerous occult systems deri… Ciliary body , ciliary body The circular band of tissue surrounding and supporting the lens of the vertebrate eye. It contains the ciliary muscles, which bring abou… Annelida , Annelida (ənĕl´Ĭdə) [Lat., anellus=a ring], phylum of soft-bodied, bilaterally symmetrical (see symmetry, biological), segmented animals, known as th… flatworm , flatworm •affirm, berm, confirm, firm, germ, herm, midterm, perm, sperm, squirm, term, therm, worm •pachyderm • echinoderm •wheatgerm • endosperm •gy…
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