Bio Starfish Lab

Problem: What are the inwrought and outdoor(a) structures of a sea feature? Hypothesis: I will examine the external and internal characteristics of a sea one. Since they are members of the phylum Echinodermata, they may discombobulate hard-boiled outmost surfaces with spines. Their internal systems may consists of a sing, stomach, digestive glands, and an anus. Materials: - keep sea maven - moldable gloves - dissecting pan - scalpel - dissecting scissors - dissecting canvas - lab apron - eye goggles Procedures: Part A: 1. Work with a partner. Wear your safety goggles, lab apron, and plastic gloves. Place the sea feature 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 dorsal surface. It is located in the fundamental disc, the area to which the weapons system are attached. 3. plication oer t he sea star so that the ventral posture is side up. Observe the ambulacral grooves that run the distance of each ray. dig up 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. punctuate the external parts that you observe.

On some other tag end or paper, record any other observations you take discombobulate 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 unspoiledy cut a jog around the madre! porite. Then cut mutilate the pitch 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 outer(a)(a) surface of the arm and the outer surface on the central disc. Do not cast deep cuts into the sea stars internal tissues. downstairs 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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