The fluid filled membrane that cushions the developing fetus and protects it from mechanical shock is the
Correct answer: C. amnion
- A. chorion
- B. allantois
- C. amnion
- D. yolk sac
Explanation
The amnion encloses the amniotic fluid in which the fetus floats, spreading any pressure evenly, keeping the temperature steady and allowing free movement of the limbs. The chorion is the outer membrane that contributes the fetal part of the placenta, so it has a nutritive rather than a protective role. In humans the yolk sac and allantois are much reduced compared with birds and reptiles.
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The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
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