BIO SCI 94 Lecture Notes - Lecture 18: Annelid, Symmetry In Biology, Gastrulation

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Brandon Stuart Gaut

Document Summary

*from textbook: nematodes & rotifers are pseudocoelomates, nematoda (nematodes, worms, caenorhabditis elegans. Important model for all kinds of studies: guinea worms. *from prof. gaut"s slides: parasite of humans in africa, get guinea worm by drinking infected water. Cephalization & cns: cephalization: development of the anterior region (brain), which is probably also related to the development of a central nervous system. *from textbook: command center, movement, anterior (head) end, posterior (tail) end, ventral (bottom) side, dorsal (top) side, right & left side, cns - centralized nervous system. It"s thought that cephalization, cns, & bilateral symmetry are all related to a life habit that includes mobility. *from textbook: 2 most important clades of animals, differ slightly in the development of the embryo (embryogenesis) in 2 ways, the mesoderm develops differently. *from textbook: gastrulation develops into the animal"s mouth in protostomes, but into the animal"s anus in deuterosomes.