The simplest, the asconoid plan, has a central choanocyte lined spongocoel that gives these sponges a vase-like appearance. Along with the different paths that water takes through the sponge are differing efficiencies for extracting food from the water. It s these differences that distinguish one sponge s architecture from the other. Depending on how elaborate the architectures is, water moves through a variety of additional channels and/ or chambers collectively called the aquiferous system. In general it flows from outside, into the sponge and past the choanocytes, and back out through the osculum.
BIODIDAC To get this job done a sponge has one of three body plans, or architectures, and each is defined by water s path through the sponge. Water passes through the mesh of the microvilli but food is trapped on the surface and engulfed by phagocytosis. The beat of the flagellum propels water away from the cell and draws it in towards the base of the flagellum. Main features of a poriferan choanocyte cell. As the water passes through, the choanocytes have a second job, filtering food particles from the water before it leaves the sponge.
1 Introduction to sponge architecture PHYLUM: PORIFERA Sponges are suspension feeders using choanocytes inside the sponge s body to pump water through the animal.
0 kommentar(er)
