HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following statements about the atria of the heart is not true?
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they are the upper chambers of the heart
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they receive blood from the body or lungs
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they contain oxygenated blood
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they have thinner walls that that of ventricles
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Explanation:
Detailed explanation-1: -After picking up oxygen, oxygenated blood enters the left auricle through pulmonary veins, then to the left ventricle, and finally out to the body tissues through the aorta. Hence, the incorrect answer is Blood-from the right side of the heart enters into the left side through the right auricle and left auricle.
Detailed explanation-2: -The blood in the atria is pumped into the heart ventricles through the atrioventricular valves. There are two atria in the human heart – the left atrium receives blood from the pulmonary circulation, and the right atrium receives blood from the venae cavae of the systemic circulation.
There is 1 question to complete.