by having groups of muscles. one pulling one way one pulling the other way
Yes, muscles can only shorten and relax. They can only pull.
all of them, muscles can only contract and relax
No. Muscles only pull (contract) and relax.
Muscles only pull. EXAMPLE: Biceps pull to close space between upper arm and forearm. Then the triceps pull to open the area again.
Brain control the muscles through nerves. Your muscles are like rubber bands only more stronger. muscles only pull and not push they pull from counter directions in a front to back way. your brain tells on of the muscles to pull and the other to not.
Muscles are like ropes in a way that muscles can only pull (contract) not push. Think of a rope you can grab the rope and pull it
Muscles! Tendons connect our muscles to our bones, and the muscles pull our bones in different motions so we can move!
No, muscles can't push! They can only pull. http://www.eslteachersboard.com/cgi-bin/motivation/index.pl?page=5;read=356
Skeletal muscles work in pair because of the limitation that these muscles can only contract or pull and can only move in one direction.
not push only pull or contract
Because Muscles only pull not push
muscles can only pull so a bone with only one muscle on it would be pulled to the extreme of the muscles contraction and stay there.