BIO 5 Lecture Notes - Lecture 6: Drug Delivery, Endoskeleton, Nerve Net
Document Summary
Cindarions are mostly marine organisms so found mostly in water. Body symmetry is radial symmetry which means you can cut the body in multiple pieces: oral surface side that has the mouth, aboral surface the side without the mouth. Radial is related to organisms that don"t move around. The idea is that if you have that lifestyle then that"s potentially beneficial. Most are considered diploblastic that have 2 germ layers which are ectoderm and endoderm. Some groups are thought to be triploblastic but we don"t know if they have a middle layer. Cnidarians have two major body forms: dimorphism means two body types. (know the exact structure, polyp , medusa . Solitary one individual separated from others. Colonial animals form groups of interconnected individuals. They are composed of individuals called zooids. You could recognize them by their gut, how they capture food such as tentacles. Support: exoskeleton - living tissue sits on top, hydro tells you water.
