Lab 3 A&P11; V. Perform the dissection procedure Heart Dissection observations a
ID: 136016 • Letter: L
Question
Lab 3 A&P11; V. Perform the dissection procedure Heart Dissection observations and answer the questions Heart Dissection 1. Place the heart in its anatomical position so that the a anterior surface facing up in the dissecting tray Cut through the wall of the aorta until you see the aortic save. Insert a pcross the two openings to the coronary arteries just above the ay one of these holes to see if you can follow the course of the heart Turn the heart to view the posterior (dorsal) surface. Identify the four veins (if present). Identify the inferior and superior vena Cavena cava atrium. Compare the diameter and structure of the superior vena cav diameter of the aorta. 2. you see the aortic semilunar valve. Identify 3. the right Which is larger? Which has thicker walls? What is the functional significance of the difference between arteries and veins? 4. Inset a probe into the superior vena cava and use scissors to cut through so that you can view the interior of the right atrium. Do not extend your cut entirely through the right atrium or into the ventricle. Observe the right AV valve. Remember that you are working on the posterior(d the right side. This is the best approach because the vessels are more accessible from the posterior (dorsal) view orsal) surface so that the right atrium is on How many flaps or cusps does this valve have? 5. Pour some water into the right atrium and allow it to flow into the ventricle. Slowly and gently squeeze the right ventricle to watch the closing action of this valve.Explanation / Answer
1.)Arota is larger(2-3cm in diameter) than superior vein cava(24mm)
2).Arota has thickened wall than vein cava
3). Difference in function:
Artery carries oxygenated blood except pulmonary artery(carries deoxygenated blood) and distributes such blood but on the other hand vein carries deoxygenated blood except pulmonary vein (carries oxygenated blood).
Auricular Valve is bicupsid(two flaps)
Compare the thickness of myocardium:---
Left ventricle has more thickness of myocardium than right ventricle. Left ventricle has to give more effort to exert blood to arota than right as well as more thickness don't let left ventricle burst.
Compare the valvess in right AV and left AV:--
Right AV is tricuspid but left AV is bicupsid valve
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