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Questions and Answers
What is the unique role of capillaries in the circulatory system?
What is the unique role of capillaries in the circulatory system?
- Acting as distributing vessels
- Collecting carbon dioxide and wastes from cells (correct)
- Passing oxygen from blood to cells
- Containing thick and muscular walls
Which blood vessel carries pure or oxygenated blood away from the heart?
Which blood vessel carries pure or oxygenated blood away from the heart?
- Veins
- Arterioles
- Arteries (correct)
- Capillaries
What is the function of valves present inside veins?
What is the function of valves present inside veins?
- Allowing blood flow in both directions
- Making blood flow only towards the heart (correct)
- Collecting carbon dioxide from cells
- Acting as distributing vessels
Which blood vessel has a wide lumen and collects carbon dioxide and wastes from cells?
Which blood vessel has a wide lumen and collects carbon dioxide and wastes from cells?
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What is the main difference between arteries and veins regarding the direction of blood flow?
What is the main difference between arteries and veins regarding the direction of blood flow?
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Why does blood flow with jerks in arteries?
Why does blood flow with jerks in arteries?
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What is the role of arterioles in the circulatory system?
What is the role of arterioles in the circulatory system?
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Study Notes
Capillaries and Blood Vessels
- Capillaries play a unique role in the circulatory system by allowing for the exchange of oxygen and nutrients with cells and removing waste products.
- The pulmonary artery carries oxygenated blood away from the heart to the lungs.
- Valves present inside veins prevent backflow of blood and ensure that it keeps moving towards the heart.
Blood Vessel Characteristics
- Veins have a wide lumen and collect carbon dioxide and waste products from cells.
- The main difference between arteries and veins is the direction of blood flow: arteries carry blood away from the heart, while veins carry blood towards the heart.
Blood Flow and Arterioles
- Blood flow with jerks in arteries is due to the pumping action of the heart.
- Arterioles play a crucial role in the circulatory system by regulating blood pressure through vasoconstriction and vasodilation.
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