They contract.
Long and complicated proteins fibres in the muscles draw across each other, bunching up, contracting the muscle.
Muscles never push - to get around this, the body puts muscles into pairs, known as antagonistic pairs, so that they each pull (contract) in opposite directions. For example, around your elbow, your bicep pulls to close your arm, and your tricep (on the other side) pulls to extend your arm.
The muscles contract which in turn push the baby out.
No. Muscles only pull (contract) and relax.
The muscles in your diaphragm contract to push the air out of your lungs.
Muscles contract and relax to pull/push
not push only pull or contract
The intercostal muscles, (muscles between the ribs), contract.
No, muscles can't push! They can only pull. http://www.eslteachersboard.com/cgi-bin/motivation/index.pl?page=5;read=356
pullThey pull on connective tissue sheaths of skeletal muscles which transmits pulling force to the bone to be move.
all of them, muscles can only contract and relax
eccentric on the way down concentric on the way up
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 contract and relax to move a joint. ... Muscles contract at a constant rate. Muscles contract and relax to move a joint.