Question

What is placenta? Write its functions.

Hint:

The placenta is vital for fetal nourishment and maintaining pregnancy in mammals.

Answer 1

Step 1: What is Placenta?
The placenta is an organ that forms during pregnancy in mammals. It connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.
Step 2: Functions of Placenta.
1. Nutrient Transfer: It provides nutrients such as glucose, amino acids, and vitamins to the developing fetus. 2. Gas Exchange: Oxygen is transferred from the mother’s blood to the fetus, while carbon dioxide is transferred from the fetus to the mother. 3. Waste Removal: Removes metabolic waste products from the fetus. 4. Hormone Production: It produces hormones such as progesterone and hCG to maintain pregnancy.
Step 3: Conclusion.
Thus, the placenta is essential for maintaining pregnancy and ensuring fetal development.
Final Answer: \[ \boxed{\text{The placenta facilitates nutrient transfer, gas exchange, waste removal, and hormone production.}} \]