GLY 1010L Lecture Notes - Lecture 7: Water Vascular System, Brittle Star, Madreporite
Document Summary
Which one is a detritivore? centipede- carnivore millipede- more legs detritivore. What is the only cephalopod specimen that has an external shell? hotalis. How can you tell the difference between a sea star and a brittle star? brittle- disk in the middle. What is the function of the madreporite? madreporite on a starfish is a water filter to keep unwanted stuff from getting into the water vascular system. What are the four chordate characteristics? dorsal hollow nerve chord, notochord, post anal tail, pharyncal gill slits. Which two chordate characteristics are present in hemichordates? the 2 characteristics shared between chordates and hemichordates is gill slits and nerve chord. What is unique about the skeleton of class chondrichthyes? the rays use a cartilaginous skeleton (cacao3) Keel: where the muscles attach the bigger the keep the better adapted to flight. Why might these vertebrae be fused? uro-style, vertebrae are focused to help as suspension when the frog lands.
