Tag: structural organization of rabbit

Trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks. Trochophores are spherical or pear-shaped and are girdled by a ring of cilia (minute hairlike structures), the prototroch, that enables them to swim.  Each segment bears a pair of paddle-like and highly vascularized parapodia, which are used for movement and, in many species, act as the worm's primary respiratory surfaces. Bundles of bristles, called setae, the project from the parapodia.

Pelvic girdle comprises of the usual three bones ilium, ischium and pubis which are fused together into a single innominate or hip bone.

In rabbit, radius and ulna are separate bones but they are joined at both ends by ligaments.