After ovulation the Graafian follicle becomes an endocrine organ called

Options

A. Interstitial organ
B. Ovarian tube
C. Globulin
D. Fibrin

Explanation

**Step-by-Step Solution:**

1. **Understanding the Graafian Follicle:** The Graafian follicle is a mature ovarian follicle that contains the developing ovum (egg) and is responsible for ovulation.

2. **Process of Ovulation:** During ovulation, the Graafian follicle releases the mature ovum into the fallopian tube, which is the site of potential fertilization.

3. **Transformation Post-Ovulation:** After the ovum is released, the remaining structure of the Graafian follicle undergoes a transformation. It does not simply disappear; instead, it changes into a new structure.

4. **Formation of Corpus Luteum:** The transformed structure is called the corpus luteum. This is a temporary endocrine gland that forms from the remnants of the Graafian follicle after ovulation.

5. **Function of Corpus Luteum:** The corpus luteum plays a crucial role in the menstrual cycle and early pregnancy by secreting hormones, primarily progesterone. Progesterone is essential for maintaining the endometrial lining of the uterus, which is necessary for implantation of a fertilized egg.

6. **Conclusion:** Therefore, after ovulation, the Graafian follicle becomes an endocrine organ known as the corpus luteum.

**Final Answer:** The Graafian follicle becomes an endocrine organ called the corpus luteum after ovulation.

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