Mention the role of the following organ:
Seminal vesicles

Explanation

### Step-by-Step Solution:

1. **Understanding Seminal Vesicles**: The seminal vesicles are accessory glands in the male reproductive system that play a crucial role in the production of seminal plasma.

2. **Contribution to Semen**: Seminal vesicles contribute significantly (about 60-65%) to the composition of semen, which is the fluid that carries sperm during ejaculation.

3. **Secretion of Fructose**: One of the primary functions of the seminal vesicles is to secrete fructose, a type of sugar that provides nourishment to the sperm cells, ensuring they have the energy needed for motility.

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