Which is not the function of placenta

Options

A. Secretes oxytocin during parturition
B. Facilitates supply of `O_(2)` and nutrients to embryo
C. Secretes estrogen
D. Facilitates removal of `CO_(3)` and water products from embryo.

Answer

**Step-by-Step Solution:**

1. **Understanding the Functions of the Placenta:**
- The placenta is an essential organ that develops during pregnancy. It plays several critical roles in supporting the developing fetus.

2. **Identifying the Functions Listed:**
- The question provides four options regarding the functions of the placenta:
a. Secret oxytocin during parturition
b. Facilitate supply of oxygen and nutrients to the embryo
c. Secret estrogen
d. Facilitate removal of CO2 and waste products from the embryo

3. **Analyzing Each Option:**
- **Option a:** Secret oxytocin during parturition - This is primarily a function of the pituitary gland, not the placenta.
- **Option b:** Facilitate supply of oxygen and nutrients to the embryo - This is a primary function of the placenta.
- **Option c:** Secret estrogen - The placenta does produce hormones, including estrogen, during pregnancy.
- **Option d:** Facilitate removal of CO2 and waste products from the embryo - This is also a key function of the placenta.

4. **Determining the Correct Answer:**
- Since option a (Secret oxytocin during parturition) is not a function of the placenta, it is the correct answer to the question.

5. **Final Answer:**
- The option that is not a function of the placenta is **a. Secret oxytocin during parturition**.

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