APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -When one of them contracts, the bone is pulled in that direction and the other muscle of the pair relaxes. To move the bone in the opposite direction, the relaxed muscle contracts and the first one relaxes. Thus two muscles have to work together to move a bone.

Detailed explanation-2: -Muscles work in pairs, when one muscle shortens the opposite muscle lengthens e.g. the biceps shortens to bend the elbow at the same time its opposite muscle, the triceps, lengthens to allow the movement to occur. Good working between pairs of muscle allows for smooth controlled movement.

Detailed explanation-3: -There are around 650 skeletal muscles within the typical human body. Almost every muscle constitutes one part of a pair of identical bilateral muscles, found on both sides, resulting in approximately 320 pairs of muscles, as presented in this article.

Detailed explanation-4: -The 3 types of muscle tissue are cardiac, smooth, and skeletal.

Detailed explanation-5: -The muscle cells move by contraction and relaxation by utilizing the energy in the form of ATP. Muscle contraction is initiated bythe signal sent by the CNS to the muscle fibres. During contraction, the muscles fibres shorten, the muscle pulls on the ligamentsthat connect the bones and the movable body parts.