One set to flex a joint, the other to extend a joint.
pairs of muscles that work together
pairs of muscles that work together
no
no it doesnt
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Yea hands are part of the skeletal system which works in pairs... The two pairs that they work with are extensor and flexors (:
Travaillez a deux
false
They were _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ .
Skeletal muscles work in pairs: flexors and extensors
Reaction pairs work on the same things and in opposite directions.
Work in pairs.