Complete the sentence to explain how body parts move.

When muscles contract and relax, the muscles move the
attached to them. This results in movement of

When muscles contract and relax, the muscles move the attached to them. This results in the movement of bones.

Explanation:

Skeletal muscles are the part of the muscular system, which are attached to the bones via tendons. The contractions or relaxation of muscles is primarily caused due to skeletal muscles. These muscles cause the mechanical movement of the body parts. These tendons are present at many joints of the body allowing muscle movement, which eventually causes bone movement.

Thus, all the vertebrates move by the action of bones. Tendons play a crucial role in the attachment of bone to the muscles. These muscles when contract or relax, cause the movement of the bones. These muscles work in antagonism, such that when one muscle flexes, the other one relaxes.

For Further Reference:

link

probably bones

Explanation:

trachea, alveoli, lung capillaries, arteries