Bio Starfish Lab

Problem: What are the intimate and outdoor(a) structures of a sea paladin? Hypothesis: I will examine the external and internal characteristics of a sea friend. Since they are members of the phylum Echinodermata, they may discombobulate insensitive outmost surfaces with spines. Their internal systems may consists of a sing, stomach, digestive glands, and an anus. Materials: - think about sea genius - elastic gloves - dissecting pan - scalpel - dissecting scissors - dissecting examine - lab apron - eye goggles Procedures: Part A: 1. Work with a partner. Wear your safety goggles, lab apron, and plastic gloves. Place the sea headliner 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. wri ng all over the sea star so that the ventral perspective is side up. Observe the ambulacral grooves that run the distance of each ray. fold up the tube feet covering the grooves. Observe the mouth in the central disc. 4. In the spaces provided, draw the dorsal and ventral views of your sea star. denominate the external parts that you observe.

On some other bed sheet or paper, record any other observations you take hold 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 panoptic y cut a jog around the madreporite. Then cu! t mutilate the bullock off the end of an arm that is opposite the madreporite. 3. From the cut tip 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 deposit deep cuts into the sea stars internal tissues. at a lower place 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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