Although Often Drawn Symmetrically,the Wall of the Right Ventricle Is

question 6

Multiple Choice

Although often drawn symmetrically,the wall of the right ventricle is actually much thinner than that of the left and is able to generate only about one-quarter of the pressure.Why might this still be physiologically acceptable?

• A) The lung is a single organ;systemic circulation requires higher pressures because the blood travels through several organs in sequence,with small drops in pressure in each.
• B) The resistance to blood flow in the lung is much less than in the body's other organs.
• C) The lungs are at the approximate level of the heart,so gravity is not a factor in pulmonary circulation.
• D) The narrow capillaries where most friction is generated are absent in the lung.

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A law enacted to protect critically endangered species from extinction as a consequence of economic growth and development untempered by adequate concern and conservation.

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Conservation methods that preserve species in their natural habitats to ensure biodiversity.

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