GROSS ANATOMY
HEART MEDIASTINUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Top
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Bottom
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Either A or B
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None of the above
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Detailed explanation-1: -STRUCTURE OF THE HEART The base is at the top, where the great vessels enter the heart and lies posterior to the sternum (Fig. 7-2). The heart consists of four chambers: two smaller atria at the top (the base) and two larger ventricles at the apex.
Detailed explanation-2: -The base of the heart, the posterior part, is formed by both atria, but mainly the left. The anterior of the heart is formed mainly by the right atrium and ventricle, due to the twisting of the heart during development, which causes the left atrium and ventricle to lie posteriorly.
Detailed explanation-3: -atria (AY-tree-uh): The two chambers at the top of the heart are called the atria. The atria are the chambers that fill with the blood returning to the heart from the body and lungs. The heart has a left atrium and a right atrium.
Detailed explanation-4: -The inferior tip of the heart, known as the apex, rests just superior to the diaphragm. The base of the heart is located along the body’s midline with the apex pointing toward the left side.