The …....X ….... cells of testes secrete testosterone in ……....
Choose the correct option for X and Y.

Options

A. X : Leydig , Y : Seminiferous tubules
B. X : Sertoil cells , Y : Blood
C. X : Sertoli cells , Y : Seminiferous tubules
D. X : Leydig , Y : Blood

Answer

To solve the question, we need to identify the cells in the testes that secrete testosterone and the location where this secretion occurs.

### Step-by-Step Solution:

1. **Identify the Cells that Secrete Testosterone**:
- In the testes, the cells responsible for the secretion of testosterone are known as **Leydig cells** (also referred to as interstitial cells). These cells are located in the interstitial space outside the seminiferous tubules.

2. **Identify the Location of Secretion**:
- The testosterone secreted by Leydig cells is released into the **bloodstream**. This hormone then travels through the blood to exert its effects on various target tissues throughout the body.

3. **Fill in the Blanks**:
- Based on the information gathered, we can fill in the blanks in the question:
- X = Leydig cells
- Y = Bloodstream

### Final Answer:
The Leydig cells of testes secrete testosterone in the bloodstream.

---