Moderate

The placenta allows exchange of:

Correct answer: C. Both nutrients and waste

  • A. Food and oxygen only
  • B. Waste only
  • C. Both nutrients and waste
  • D. Only hormones

Explanation

Placenta enables transfer of O₂, nutrients, and removal of CO₂, wastes between mother and fetus.

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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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