coelom

/see-luhm/US // ˈsi ləm //UK // (ˈsiːləʊm, -ləm) //

棺材,棺木,椁室,棺材室

Definitions

n.名词 noun

1
plural coe·loms, coe·lo·ma·ta [si-loh-muh-tuh]. /sɪˈloʊ mə tə/. Zoology.
- : the body cavity of higher metazoans, between the body wall and intestine, lined with a mesodermal epithelium.

The existence of two renal organs in Patella, and their relation to the pericardium (a portion of the coelom), is important.
Some of the endothelial cells lining the coelom are ciliated, the cilia keeping the corpusculated fluid contents in movement.
In Crania it is completely shut off from the main coelom, but in Lingula it communicates freely with this cavity.
When the mesoderm develops into two plates, a cavity, called the Primitive Coelom, appears between the plates.
There should also be only a single coelom, or a pair of lateral coelomic cavities.