In the human respiratory system, gas exchange occurs across the cells of the ________.
A) diaphragm
B) trachea
C) bronchi
D) alveoli
Correct Answer:
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Q17: In humans, oxygen is delivered from the
Q18: Animals such as hydras and jellies can
Q19: In animals with a closed circulatory system,
Q20: Which blood vessels have thin, leaky walls?
A)capillaries
B)venules
C)arteries
D)veins
Q21: Leukemia _.
A)decreases the production of white blood
Q23: Reduced consumption of _ is associated with
Q24: To allow rapid diffusion between the body
Q25: In a human, the _ provide(s)a common
Q26: Together, inhalation and exhalation are referred to
Q27: When you hold your breath, which changes
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