Why are all spinal nerves classified as mixed nerves?

Explanation

**Step-by-Step Solution:**

1. **Definition of Spinal Nerves**: Spinal nerves are the nerves that emerge from the spinal cord. They are responsible for transmitting information between the spinal cord and the rest of the body.

2. **Composition of Spinal Nerves**: Each spinal nerve is composed of two types of fibers: sensory (afferent) fibers and motor (efferent) fibers.

3. **Function of Sensory Fibers**: Sensory fibers carry information from sensory receptors in the body (such as skin, muscles, and organs) to the spinal cord and then to the brain. This information includes sensations such as touch, pain, temperature, and proprioception.

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