It is a tube that connects a developing embryo or fetus to the placenta:
Correct answer: C. Umbilical cord
- A. Amnion
- B. Chorionic villum
- C. Umbilical cord
- D. Allantois
Explanation
The umbilical cord is a flexible tube-like structure that connects the fetus to the placenta. It contains blood vessels (two arteries and one vein) that transport nutrients and oxygen from the mother to the fetus and remove waste products from the 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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