BIO 2135 Lecture Notes - Lecture 18: Neural Tube, Cecum, Tunicate

• School: University of Ottawa
• Department: Biology
• Course: BIO 2135
• Professor: Jon Houseman

Document Summary

Metacoel (branchiogenital trunk, hepatic trunk, intestinal trunk) They have a pumping heart pumps blood and squeezes the blood vessel that sits on top of the stomochord) Heart rolls on the blood vessel, almost peristaltically, projects the blood forward. Puts blood pressure, forces liquid component through the walls of the blood vessels filtrated by pressure. Glomerulus : a region with high blood pressure, sends a filtrate to a thin wall, where some can exit. Propels particulate material back towards the preoral ciliary organ sorts food externally rejects inappropriate food particles, consolidates a mucus string with appropriate food, propels it into the digestive tract. Cilia create water current that pulls in the mucus, then the water exits out the gills. Induction: a cell is induced to develop into what it"s going to be by other cells around it. Interaction between the endoderm and ectoderm (endothelium and endothelium) causes certain cells to develop into the notochord.