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Recommended video: Skeletal muscle tissue [12:25]
This type of tissue is found in skeletal muscles and is responsible for the voluntary movements of bones.

The term sarcoplasm refers to the cytoplasm of a muscle cell and is where metabolic processes of the cell take place. It is surrounded by a plasma membrane called the sarcolemma, which regulates the movement of various materials into or out of the muscle cell.

The sarcoplasm is unique from the cytoplasm of other cells beacuse it contains large stores of glycogen, and the oxygen binding protein myoglobin. Additionally, it contains several specialized organelles which play important roles in muscle contraction.

The dominant features of the sarcoplasm are myofibrils, which are contractile proteins that shorten during contraction, and a high density of mitochondria. Similar to the cytoplasm of other cells, it bears several additional organelles inculding ribosomes, Golgi apparatus and specialized endoplasmic reticulum called sarcoplasmic reticulum, which stores and releases calcium ions (Ca2+) crucial for muscle contraction.

Terminology English: Sarcoplasm

Cytoplasm of muscle cell or fiber
Function Site of metabolic processes of muscle cells
Supports muscle contracion

Learn more about the sarcoplasm in the following study units:

Sarcoplasm: want to learn more about it?

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