Use complete sentences to explain what happens in the nervous system when your finger is hurt. Include an explanation of what a neuron is.

So say that you cut your finger, this causes tissue damage, which is registered by microscopic pain receptors in your skin, and each one of those pain receptors creates one end of a nerve cell. The nerve cell is connected to the other end of the spinal cord with a long nerve axon.

A neuron is a nerve cell that is the basic building block of the nervous system.

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the fossil record provides evidence of a common ancestor to many species.