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Muscular System

Physiology of Skeletal Muscle Contraction

Contraction of a muscle fiber is a complex process that involves a number of rapid structural and chemical changes within the muscle fiber. The molecular mechanism of contraction is explained by the sliding-filament model. Mechanism of Contraction In order for a muscle fiber to contract it needs

Actions of Skeletal Muscles – Origin, Insertion and Muscle Interactions

Skeletal muscles come in different shapes and sizes but the main structure of a skeletal muscle cell is basically the same. If a cross-section is done of a single muscle, it can be seen that it is covered in a protective sheath or layer called the epimysium.

Major Skeletal Muscles

There are more than 600 muscles in the body, but only a few of the major muscles are considered here. Muscles of Facial Expression And Mastication Muscles of the face and scalp produce the facial expressions that help communicate feelings, such as anger, sadness, happiness, fear, disgust,

Muscular Disorders

Cramps involve involuntary, painful tetany. The precise cause is unknown, but a cramp seems to result from chemical changes in the muscle, such as ionic imbalances or ATP deficiencies. Sometimes a severe blow to a muscle can produce a cramp.   Fibrosis (fi-bro’-sis) is an abnormal increase

Muscle Tissue And Types of Muscle Tissue

MUSCLE TISSUE is the only tissue in the body that is specialised for contraction (shortening). The body contains three types of muscle tissue: skeletal, smooth, and cardiac. Each type of muscle tissue exhibits unique structural and functional characteristics. Contraction of skeletal muscle tissue produces locomotion, movement of

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