The external os is the
A. opening of the cervix into the vagina.
B. bone that supports the uterus during pregnancy.
C. inferior portion of the central cavity.
D. uterine tube attachment site.
E. primary suspensory ligament for the uterus.
Answer: A
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How have selective pressures altered the expression of the LDH-B gene among populations of killifish living along the eastern coast of North America?
What will be an ideal response?
Muscular arteries
A) are larger than elastic arteries and smaller than arterioles. B) are exemplified by the aorta. C) serve as the cushion to prevent sudden rises in blood pressure from causing trouble for the circulation. D) have a thick media with a large amount of smooth muscle fiber within them. E) None of the answers are correct.
Which cellular element is part of the body's specific defenses?
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