单词	coelom
释义	coelom /ˈsiːləm / noun (plural coeloms or coelomata /siːˈləʊmətə/) Zoology The principal body cavity in most animals, located between the intestinal canal and the body wall.In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system.... The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms. The coelom extends into the rays, where the gonads are located. Derivatives coelomate adjective & noun ... Schizocoelous mesoderm formation in coelomate spiralians also makes use of individual cell immigration during its early phase. They first evolved in the earlier Cambrian period, as part of the great radiation of coelomate animals that occurred at that time. The genes have an arrangement relatable to those of coelomate metazoans, but not to those of secernentean nematodes. coelomic /səˈlɒmɪk/ adjective ... The reproductive system is composed of a single saccular gonad in a coelomic pouch lying dorsal to the digestive system. The soft parts in the axial canal of the stem consist of nerve cords, coelomic cavities, and associated organs which require more metabolic maintenance. These characters would have facilitated volume changes of the coelomic cavity due to dorso-ventral rotation of the ‘synsacrum’ on the dorsal vertebrae. Origin Late 19th century: from Greek koilōma 'cavity'.
随便看	proanthocyanidin pro aris et focis proatlas pro-attitude proaulion proavian proavis prob probabilifiable probabilification probabilificatory probabilify probabiliorism probabiliorist probabilise probabilistic probabilistically probability probability amplitude probability curve probability density probability density function probability distribution probability function probability generating function

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