What are the functions performed by histamine in the body ?

Explanation

### Step-by-Step Solution:

1. **Introduction to Histamine**:
- Histamine is an organic compound that plays a crucial role in various physiological functions in the body. It is classified as a biogenic amine and is involved in local immune responses, regulation of physiological functions in the gut, and acts as a neurotransmitter.

2. **Vasodilation**:
- One of the primary functions of histamine is its role as a potent vasodilator. This means that it helps to widen blood vessels, which increases blood flow to certain areas of the body.

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