GENERAL HISTOLOGY

Detailed explanation-1: -The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.

Detailed explanation-2: -Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can’t push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.

Detailed explanation-3: -Four functions of muscle contraction are movement, posture, joint stability, and heat production. Three types of muscle are skeletal, smooth, and cardiac.

Detailed explanation-4: -Movement. Skeletal muscles pull on the bones causing movements at the joints. Support. Muscles of the body wall support the internal organs. Protection. Heat generation. Blood circulation.