The primary sex organ in human males is

Options

A. prostate gland
B. seminal vesicle
C. penis
D. testis

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the primary sex organ in human males.

2. **Understand the Options**: The options provided are prostate gland, seminal vesicle, penis, and testis.

3. **Define the Primary Sex Organ**: The primary sex organ in males is responsible for the production of gametes (sperm) and hormones (like testosterone).

4. **Locate the Testis**: The testis is located outside the abdominal cavity within a pouch called the scrotum.

5. **Function of the Scrotum**: The scrotum helps maintain a lower temperature than the body’s core temperature, which is essential for the process of spermatogenesis (the production of sperm).

6. **Structure of the Testis**: Each testis is divided into about 250 compartments known as testicular lobules.

7. **Spermatogenesis**: Within these lobules are highly coiled structures called seminiferous tubules, where spermatogenesis occurs.

8. **Cell Types in the Testis**: The seminiferous tubules contain male germ cells (spermatogonia) and Sertoli cells, which provide nourishment to developing sperm.

9. **Conclusion**: Based on the above information, the primary sex organ in human males is the testis.

10. **Final Answer**: The correct answer is **testis**.

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