BIOL 1030 Study Guide - Midterm Guide: Anthozoa, Triploblasty, Osmoregulation

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Kevin G.Scott

Document Summary

Tentacles are armed with battery of cnindocytes unique to cnidarians that defend and capture prey. Cnidrocytes contain cnidae capsule like that can explode out this gives the phyla its. Specialized cindea called nematocysts contain stinging thread that penetrates wall of prey. Some animals that feed on the tentacle such as slugs can pass the nematocysts through their digestive system without ring and store them into their pouches to be used for their own defence. Contractile and nerve tissue occurs in the simplest forms, cells of the epidermis and gastrodermis have bundles of micro laments arranged into contractile bres. The gastrovascular cavity acts as a hydrostatic skeleton against which the contractile cells can work. When cnidarians close their mouth their volume is xed and contractions cause the animal to change shape. Moves are coordinated by nerve net, they have no brain, the non centralized nerve cells distributed through the body which enables them to detect stimulus from all directions.