CHM101H1 Lecture 4: Animals II Mussel Dissection 2018
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Animals ii activity 1 mussel dissection (a) (b) One group member collects a mussel (mytilus sp. ), 1 dissection dish, 1 needle probe, 1 blunt probe, 1 pair scissors and 1. External anatomy: identify the following structures: right and left valves of the shell, hinge, and the dorsal, ventral, anterior and posterior parts of the animal. Look at the large posterior adductor muscles holding the two valves together. (figure. 1 a and b: carefully open the valves. You will have to cut the large posterior adductor muscles (and smaller muscles) and ligaments that hold the left and right valves together. Ideally, the thin mantle membrane should remain attached to each of the valves. Often the mantle: once your mussel is open, lay it flat in your dissecting tray so that you can examine the interior structures, examine the mantle membrane, which secretes the calcium carbonate shell.
