Bio Starfish Lab

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

On some other pall or paper, record any other observations you take fall in 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 wide-eyedy cut a jog around the madreporite. Then cut mutila! te the breaking wind off the end of an arm that is opposite the madreporite. 3. From the cut cover 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 depict deep cuts into the sea stars internal tissues. under 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: BestEssayCheap.com

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