The On The Dissection Board

1129 Words Jul 12th, 2015 5 Pages
Materials:
- Scalpel
- Tweezers
- Blunt probe
- Disposable gloves
- Dissection board
- Sheep heart

Method:
1) Place the heart on the dissection board
2) Identify as many of the external features as you can: right and left atria, right and left ventricles, aorta, vena cava, pulmonary arteries and veins.
3) Use the blunt probe to investigate which chamber of the heart the blood vessels enter or leave. Use the scalpel to make cut as shown in Figure 1. Cut with the blade pointing upwards and away from you.
4) Observe the thickness of the wall of the right ventricle
5) Open out the right ventricle
6) Observe the tendon and the valves to which they are attached
7) Work out how the valves work to control the blood flow
8) Observe the flaps of skin at the base of the pulmonary artery. These are the semilunar valves.
9) Make cut 2 to open the left ventricle. Continue the cut up into the aorta.
10) Observe the thickness of the left ventricle.
11) Find the position of the semilunar valves at the end of the aorta

Safety:
Take care with sharp instruments. Wear disposable gloves when handling the heart. Wash your hands thoroughly after you have completed the dissection.
Results: The findings were as expected. It was observed that the heart is a muscular organ, of a red colour. Picture 1: the heart once dissected. Drawing 1: made to show the dissected heart. Discussion:
The artery walls are made of a couple of thick layers of extensible smooth muscle…

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