When dissecting pig heart, we should choose to observe the position of valve.

To dissect the pig heart and observe the position of the valve, we usually choose the left and right sides of the heart. In pig heart dissection, the side far away from the aorta is usually chosen, because the aorta is on the left, and its valve is hard and difficult to cut. When choosing anatomical location, we should also pay attention to the size and anatomical depth of the heart to avoid damaging key anatomical structures. In addition, safety measures should be taken before autopsy, gloves should be worn, and dead animals or animals with abnormal development should not be contacted to prevent possible infectious diseases or other hazards.