BIL 160 Chapter Notes - Chapter 33: Gastrointestinal Tract, Gastrovascular Cavity, Lophophore
28 Apr 2016
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Totipotent = capable of becoming other types of sponge cells: hermaphrodites = each one functions as both sexes at different times, cribrostatin compound which can kill cancer cells. Cnidarians (ancient phylum of eumetazoans: all animals except sponges and few others are eumentazoans (true animals, hydras, corals and jellies, diploblastic radial body plan, basic body plan = sac w/ central digestive compartment (gastrovascular cavity, polyp. Cylindrical that have tentacles in air and sessile. Moves freely by drifting and contractions of bell-shaped body: some exist as only one and some cnidarians have both stages in their life cycle, tentacles have cells called cnidocytes. Chapter 33: diverged into two major clades: Lophotrochozoa (widest range of body forms: most animals belong to bilateria clade (lophotrochozoa, ecdysozoa and deuterostomia, bilateral symmetry and triploblastic development, some develop a lophophore and others a trochopore larva. Crown of ciliated tentacles that function in feeding. Life stage: 6 of the phyla, flatworms.
