Name the longest cell in the human body and also state its function

Explanation

**Step-by-Step Solution:**

1. **Identify the Longest Cell**: The longest cell in the human body is the neuron, also known as a nerve cell.

2. **Length of the Neuron**: Neurons can be quite long, with some reaching lengths of up to 1 meter.

3. **Function of Neurons**: Neurons serve as the structural unit of the nervous system. They play a crucial role in transmitting information throughout the body.

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