Question

The correct pathway of oxygenated blood coming from lungs to the heart in the

human body

A. Pulmonary arteries → Right ventricle → Right atrium

B. Pulmonary arteries → Right atrium → Right ventricle

C. Pulmonary veins → Left ventricle → Left atrium

D. Pulmonary veins → Left atrium → Left ventricle​

Answer 1

Answer:

Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle.

Answer 2

The correct pathway of oxygenated blood coming from the lungs to the heart in the human body D. Pulmonary veins → Left atrium → Left ventricle​.

Blood circulation:

• Blood flows from the body into the right atrium, then into the right ventricle, and finally into the pulmonary arteries in the lungs.
• After collecting up oxygen, blood returns to the heart via the pulmonary veins into the left atrium, then to the left ventricle, and finally to the body's tissues via the aorta.
• The following is the order in which blood goes through the heart: 1) the body -> 2) the inferior/superior vena cava -> 3) the right atrium -> 4) the tricuspid valve -> 5) the right ventricle -> 6) the pulmonary arteries -> 7) the lungs -> 8) the pulmonary veins -> 9) the left atrium -> 10) the mitral or bicuspid valve -> 11) the left ventricle -> 12) the aortic valve

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