Sertoli cells are found :

Options

A. pancreas and secrete cholecystokinin
B. ovaries and secrete progesterone
C. adrenal cortex and secrete adrenaline
D. seminiferous tubules and provide nutrition to germ cells

Answer

### Step-by-Step Solution:

1. **Understanding the Location**: Sertoli cells are specialized cells that are found within the seminiferous tubules of the testes.

2. **Structure of Seminiferous Tubules**: The seminiferous tubules are the site of spermatogenesis, the process of sperm production. They contain various types of cells, including spermatogonia, spermatocytes, and spermatozoa.

3. **Role of Sertoli Cells**: Sertoli cells, often referred to as "nurse cells," play a crucial role in supporting and nourishing the developing sperm cells. They provide essential nutrients and create an environment conducive to sperm development.

4. **Hormonal Influence**: Sertoli cells are influenced by hormones, particularly Follicle Stimulating Hormone (FSH) released from the anterior pituitary gland. FSH acts on Sertoli cells to promote their function and support spermatogenesis.

5. **Additional Functions**: Sertoli cells also secrete hormones such as Anti-Müllerian Hormone (AMH), which is involved in the regression of the Müllerian ducts during male development, preventing the formation of female reproductive structures.

6. **Conclusion**: Therefore, Sertoli cells are specifically located in the seminiferous tubules of the testes and are essential for the nourishment and development of sperm cells.

### Final Answer:
Sertoli cells are found in the seminiferous tubules of the testes.

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