The human embryo remains enclosed in:
Correct answer: A. Amniotic sac
- A. Amniotic sac
- B. Placenta
- C. Chorion
- D. Allantois
Explanation
The human embryo remains enclosed in the amniotic sac, a fluid-filled membrane that provides protection and a stable environment for development. The sac is filled with amniotic fluid, which cushions the embryo against mechanical shocks, prevents dehydration, and allows free movement essential for proper growth. The amniotic sac, along with the placenta and umbilical cord, plays a crucial role in supporting the embryo throughout pregnancy by facilitating nutrient exchange and waste removal while safeguarding it from external harm.
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About Reproduction
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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