Question

Blood leaving the left ventricle is first delivered to the

A: surface of the heart
B: lungs
C: thoracic aorta
D: abdominal aorta

Answer 1

Blood leaving the left ventricle is first delivered to the thoracic aorta.

Step-by-step explanation:

The correct answer is C: thoracic aorta.

After being pumped out of the left ventricle, blood is delivered to the thoracic aorta. The thoracic aorta is the part of the aorta that runs through the chest and carries oxygen-rich blood to the organs and tissues of the upper body.

In the circulatory system, blood is pumped by the heart, specifically the left ventricle, to the aorta, which serves as the main artery of the body. From the aorta, blood is then distributed to different parts of the body through smaller arteries.

Answer 2

Blood leaving the left ventricle first enters the thoracic aorta. The thoracic aorta is part of the systemic circulation, which supplies oxygenated blood to the body. The right ventricle sends blood to the lungs for oxygenation, and the right atrium receives blood returning from the body.

Step-by-step explanation:

Blood leaving the left ventricle is first delivered to the thoracic aorta (Option C). After being pumped out of the left ventricle, the blood passes through the aortic valve into the aorta, which is the main artery that carries oxygenated blood from the heart to the rest of the body. The thoracic aorta is the portion of the aorta that runs through the chest (thoracic) cavity before branching into smaller arteries that supply oxygenated blood to the body's tissues.

The right ventricle, on the other hand, sends blood to the lungs (Option C of the second question) for oxygenation via the pulmonary arteries. The systemic circulation starts with the left side of the heart sending oxygen-rich blood to the rest of the body. The correct sequence of blood flow from the heart out to the body and back is: aorta, arteries, capillaries, venules, veins. Lastly, the right atrium (Option C of the fifth question) initially receives blood from the systemic circuit, which has returned from the body's tissues.