What is the nature of testosterone?

Explanation

### Step-by-Step Text Solution

1. **Definition of Testosterone**: Testosterone is a steroid hormone primarily produced in the interstitial cells (Leydig cells) located between the seminiferous tubules of the testes.

2. **Chemical Nature**: Testosterone belongs to a class of hormones known as steroids. Steroid hormones are derived from cholesterol and are characterized by a specific four-ring carbon structure.

3. **Location of Production**: Testosterone is secreted in the spaces between the seminal vesicles, where the interstitial cells are found. These cells play a crucial role in the production of testosterone.

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