Key Definitions for Muscles

Key Definitions for Muscles

Skeletal muscle - the muscle that cause our bodies to move, also called striated muscle.

Myofibril - part of a muscle fibre, contains saraomeres and the contractile protein actin and myosin.

Saccoplasmic reticulum - equivalent to to the endoplasmic reticulum of the cells. It forms a network of channels that spread out over the surface of the myofibrils and acts as a store of calcium irons that when released initiate muscle contraction.

Sarcoplasm - the equivalent of cytoplasm - the liquid interior or a muscle fibre.

A band - the dark band in a myofibril.

I band - the light band in myofibril.

H zone - the lighter region in the…