extension, contraction
muscles contract and relax by bring about movements.
involantary muscles form movements like cardaic muscles do
Different muscles are involved in different movements.
Voluntary muscles help you to perform voluntary movements.
Your Skeletal Muscles
Muscles contain certain proteins called contractile proteins which enable it to contract and relax to bring about movements.
Complex muscle movements is the ability for the muscles to move to the desired directions.
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Ligament
they are called involuntary movements.......controlled by involuntary muscles.....eg: heart beats...
These muscles are the pectoralis major and the pectoralis minor muscles.
You have no muscles in your fingers only tendons. The muscles in your lower arm control your hand movements and grip strength