GENERAL ANATOMY
ANATOMY OF THE HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Deoxygenated blood is elivered to the lungs by the aorta.
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Oxygenated blood is returned to the right atrium by the pulmonary vein.
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At the capillaries, the blood changes from blue to red as it picks up oxygen.
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At the capillaries, the blood changes from red to blue as it drops off oxygen in body tissues.
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Detailed explanation-1: -Pulmonary circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide. The oxygenated blood then flows back to the heart. Systemic circulation moves blood between the heart and the rest of the body.
Detailed explanation-2: -While by convention arteries are drawn as red and veins as blue, in the pulmonary circulation arteries actually carry desaturated blood (systemic venous “blue blood"), and the pulmonary veins carry highly saturated blood (systemic arterial “pink blood").
Detailed explanation-3: -Blood flows through the tricuspid valve into the right ventricle. It then flows through the pulmonic valve into the pulmonary artery before being delivered to the lungs. While in the lungs, blood diverges into the numerous pulmonary capillaries where it releases carbon dioxide and is replenished with oxygen.
Detailed explanation-4: -The pulmonary arteries and veins carry deoxygenated blood, and they are typically colored blue on models to reflect this fact. In contrast, the rest of the arteries in the body carry oxygenated blood and are colored red to reflect this fact.