Its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.
Answer:
T-Cell
Explanation:
T-Cell is the first line of deffence
An MRI is needed when doctors think there is inflammation, a tumor, or something medically wrong with the brain that we can't see on the outside.
Instead of walking he could run or jog. If there is a longer way he took take that way
