Answer:
Your question is not clear
Answer:
Nervous System
Explanation:
"Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron."
Blood stream.
Once they enter that wound, it can be infected because germs ended up in the blood stream.
The answer is B) Muscle fiber aka Fascicles this is what there called in the definition.
