Question

After injuring his knee, Kai began having pain and numbness in his lower leg. The doctor said the injury damaged nerves that run all the way down his leg.

Damage to which system is causing Kai's pain and numbness?

the peripheral nervous system
the central nervous system
the endocrine system
the circulatory system

Answer 1

The peripheral nervous system! It has sensory cells everywhere and sends an electrical message to the brain to process the sense, in this case touch.

Answer 2

The Peripheral Nervous System:

Since the central nervous system is the system of nerves that goes down your spine, you could easily mix up both the peripheral and the central nervous system. The peripheral nervous system are all the nerves throughout your body like your arms and legs. Thus, this is what is causing Kai so much pain.