Question

The dorsal aorta arises from:
A. Left ventricle
B. Right ventricle
C. Left atrium
D. Right atrium

Answer 1

Hint: We have to remember that the dorsal aorta is one of the blood vessels in a single-pass circulatory system. We have to remember that this blood vessel is said to be the one which transmits oxygenated blood from the gills to the rest of the body of the fishes.

Complete answer:
We have to know that the dorsal aorta has the posterior to the peritoneal cavity. Thus, one can say that it is theoretically the caudal artery. Just beneath the vertebra and above the dorsal surface of the kidney, there exists a transportation of dorsal aorta. Thus, we can say that it arises from the left ventricle.
It is said that the right ventricle gives rise to the aorta. Thus, the oxygen-poor blood which is returning to the heart from the body is pumped back out to the aorta without first working to the lungs to take up the oxygen.
We must know that the blood from the pulmonary veins from both lungs is received by the left atrium. Thus, it is the only one which is responsible for draining blood into the left ventricle through the mitral valve.
As we know already, the first chamber of the heart is said to be the right atrium. Thus, the right atrium is responsible for receiving blood which is rich in deoxygenated and carbon dioxide systemic blood from the parts of the body.
So, the correct answer is “Option A”.

Note:
We should know that the blood passes only once through the heart to provide the body once in a single-pass circulatory system. One can say that the main function of the aorta is to distribute the blood which is rich in the oxygen to all the parts in the body. Generally, the dorsal aorta is the one which supplies the blood to most of the parts present near the kidney.