Q: What system is the spinal cord related to?


Read this paragraph and choose the correct option from the provided answers:

Some people recover from spinal cord injuries. But many people are paralyzed for life. Thanks to the work of Christopher Reeve ( Figure below ), more research is being done on spinal cord injuries now than ever before. For example, scientists are trying to discover ways to regrow damaged spinal cord neurons.

 Choices:

- circulatory system

- lymphatic system

- digestive system

- nervous system


A:
nervous system