How does the respiratory pump aid venous return?
A. Low pressure during inhalation draws blood toward the heart.
B. Valves in arteries and veins are assisted by breathing movements.
C. Exhaling and blowing out draws blood toward the tissues.
D. Skeletal muscle contractions in the extremities pushes blood through veins.
Answer: A
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A. secretory; proliferative; selection of the dominant follicle B. proliferative; secretory; ovulation C. follicular; luteal; a rise in basal body temperature D. menstrual; proliferative; ovulation E. proliferative; secretory; menstruation
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