When the connective tissue at either end of a muscle narrows to attach the muscle to a bone, the connective tissue is called a tendon. A tendon actually is continuous with the periosteum connective tissue that is the outer layer of a bone. In this way, muscle connections to bone are very strong. As its name infers, skeletal muscle is generally attached to bone, by means of tendons. Tendons are actually a continuation of the connective tissue covering of a muscle with the connective tissue covering of a bone.
Skeletal muscle comprises the familiar gross anatomic muscle organs.
Red and white muscle are subtypes of skeletal muscle, referring to the color of the muscle due to blood supply and also cellular amounts of myoglobin protein. Myoglobin binds oxygen very tightly, releasing the oxygen only when cell levels of oxygen become very low. In this way myoglobin can be though of as a type of cellular scuba tank. Fast twitch muscle fibers are adapted for sprinting and strength, and also correspond to white muscle. Slow twitch muscle fibers are adapted for endurance, and correspond to red muscle.