BIOL 1503 Chapter : Starfishchecklist2011
Document Summary
Directions: read all instructions before making any cuts. Then, the instructions step-by-step, locating each of the structures in the order they appear in the directions. The stomach may adhere to the aboral disk. Carefully separate the two structures by gently scraping the stomach away from the aboral disk with a blunt probe. Try not to break the intestine, the short tube coming from the aboral surface of the stomach. Now the entire body contents should be visible: note that the coelom is surrounded by the digestive system, the stomach is the central, pouch-like structure. Gently push it aside to identify its two components: the pyloric stomach and the cardiac stomach. The stone canal is a short, bent tube coming from the bottom of the madreporite. The ring canal is a circular canal around the disk to which the stone canal is connected. The radial canal runs medially through each ray: the ampullae are bulb-like structures above the tube feet.
