BIO 1130 Study Guide - Amoeboid Movement, Paleozoic, Cambrian

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: All

Document Summary

Amebocyte: a cell in a multicellular organism that moves using amoeboid movement, amebocytes often are involved in transporting materials, defending against invading organisms, or cleaning up dead debris and materials. Archenteron: archeocytes in sponges, developing gut, blastopore (opening on the surface of an embryo) connects it to the outside environment. In deuterostomes, mesoderm forms from outpocketings of the archenteron. Archeocyte: amoeboid cells that move throughout the mesohyl (gelatinous matrix between the two layers of cells in sponges) by amoeboid movement, produce collagen and spongin (collagen-like protein, totipotent can differentiate into any cell type found in. Asymmetric body plan sponges including egg and sperm: can specialize into spicules (extracellular rigid supporting structures) that give shape to a sponge, animals that have no axis of symmetry, ex. Sponges, gastropods: because a sponge doesn"t have a mouth or digestive tract, it doesn"t have an oral to aboral axis to define any form of symmetry and is technically asymmetric.