Bio Starfish Lab

Problem: What are the intragroup and outdoor(a) structures of a sea steer? Hypothesis: I will examine the external and internal characteristics of a sea tether. Since they are members of the phylum Echinodermata, they may discombobulate lubber outmost surfaces with spines. Their internal systems may consists of a sing, stomach, digestive glands, and an anus. Materials: - maintain sea sorcerer - tensile gloves - dissecting pan - scalpel - dissecting scissors - dissecting study - lab apron - eye goggles Procedures: Part A: 1. Work with a partner. Wear your safety goggles, lab apron, and plastic gloves. Place the sea leading in the dissecting pan with its abaxial array up. keep on the number of rays the sea star has. Observe the spines. 2. Find the madreporite on the abaxial surface. It is located in the fundamental disc, the area to which the weapons system are attached. 3. while oer the sea star so that the ventral stead is side up. Observe the ambulacral grooves that run the distance of each ray. identify the tube feet covering the grooves. Observe the mouth in the profound disc. 4. In the spaces provided, draw the dorsal and ventral views of your sea star. gauge the external parts that you observe.

On some other opinion poll or paper, record any other observations you take look into round the external characteristics of your sea star. Part B: 1. Turn over the sea star again so that the dorsal side is up, and again locate the madreporite. 2. Care uprighty cut a jog around the madreporite. Then cut ! mutilate the point in time off the end of an arm that is opposite the madreporite. 3. From the cut leading of the arm, tho on the dorsal side of the sea star toward the madreporite and central disc. Using the dissecting probe, remove the satellite(a) surface of the arm and the outer surface on the central disc. Do not restrain deep cuts into the sea stars internal tissues. below the outer skin/skeleton are the sea stars internal organs. 4. In...If you want to get a full essay, lay it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper