What Is Cardiac Muscle Tissue?

Muscle tissue is composed of specially differentiated muscle cells. Many muscle cells are gathered together and surrounded by connective tissue to form a muscle bundle. There are abundant capillaries and fibers in the distribution. Its main function is contraction. It performs all kinds of movements of the body and the activities of various organs in the body. Muscle tissue is mainly composed of muscle cells, which can be divided into three types: smooth muscle, skeletal muscle and cardiac muscle.

Function of muscle tissue : contraction and relaxation

Specially differentiated

Muscles work by relying on the contraction of fleshy fibers, which are pulled together in the middle, causing the bulk of the muscle body to expand. At one end there was gravity, weight, or the leverage of the muscles around it, and the other end was pulled over, so the desired action was completed. Therefore, the contraction makes the muscle appear to "move" toward its starting point. The main muscle responsible for doing a certain action is called the main muscle, and the muscle fixed at the beginning of a main muscle is called the fixed muscle. The contraction of a main muscle may cause unnecessary movements of some joints attached to its attached end, so other muscles are needed to keep these joints inactive. The muscles that prevent this movement are called synergistic muscles . A plan view of a lifter crane can illustrate some principles of muscle function. The hoisting rope on the crane is the main muscle and works on the hoisting pulley; the pulling rope that stabilizes the central pillar of the crane is equivalent to the fixed muscle, and the clue that stabilizes the tappet and the central pillar is like a synergistic muscle. However, as far as the muscle body is concerned, the execution of an action also requires the ability to return from this action, so most muscles have corresponding antagonist muscles, and each muscle has a corresponding piece, such as viewed from the calf. The diaphragm flexes the knee, while the quadriceps straightens the knee. 3 May wish to understand the body as being in a stable contracted state. This state is described as a normal muscle expansion state, which allows the body to maintain a stable position. When the muscle is at rest, it is not ineffective. In a sense, the action is just to break the balance of the normal contractile state of the muscle-a muscle bulges under the action of another muscle (its antagonist muscle), and the muscle that produces the effect must be "released" ^[2] .