The fastest a muscle fiber can contract is 0.01 seconds or less. However, this is not necessarily the speed that the actual muscle contracts at. For example, the human eyelid can only blink in 0.15 seconds.
Muscles move when you flex or relax them. They tighten or contract when you flex, lengthen when you relax
muscles contract when you tell them to...
Nitrogen
With your muscles.
the body system moves the body is the muscles
smooth muscles
Muscles do .
Calf
Muscles do .
The muscles
triceps brachii
Skeletal Muscles.
Google it mate?
skeletal muscles