An investigation traces the concentration of oxygen gas contained in blood as the blood passes through the circulatory system. which choice below begins with the area of the circulatory system where blood has the highest oxygen level and ends where blood contains the lowest oxygen level? a. capillaries, veins, right ventricle, lungs, left ventricle b. lungs, left ventricle, capillaries, veins, right ventricle c. right ventricle, lungs, left ventricle, capillaries, veins d. veins, right ventricle, lungs, left ventricle, capillaries

The correct answer would be B. Lungs, left ventricle, capillaries, veins, right ventricle.

It can be explained with the help of double circulation.

The oxygenated blood from the lungs is transported to the left atrium with the help of pulmonary veins.

The left atrium then passes the oxygenated blood to the left ventricle which passes the blood to all parts of the body via aorta.

The artery then divides into fine capillaries which supply cells and tissues of the body.

The cells use the oxygen and produce carbon dioxide as the byproduct of cellular respiration.

The blood is now termed as deoxygenated blood which is carried out by veins.

Vein transport this blood to the right atrium of the heart which passes the same to the right ventricle.

Left ventricle then pumps the blood towards lungs for oxygenation.

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