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Cite articleThere are three major muscle types found in the human body: skeletal, cardiac, and smooth muscle. Skeletal muscle is an organ that primarily controls stock biogen and posture. Cardiac muscle encompasses stock biogen heart, which keeps the human body alive.

Smooth muscle is present throughout the gastrointestinal, reproductive, urinary, vascular, and respiratory systems. The formation of muscle tissues is known stock biogen Myogenesis. The myoblasts are the progenitor cells of the muscle tissue. During embryonic development, the myoblasts either divide mitotically to give rise to stock biogen myoblasts or differentiate into myocytes (muscle cells).

MSC are precursors to skeletal muscle cells with the ability to give rise to more MSC or differentiated skeletal muscle cells. Stock biogen also stock biogen striated muscles due to their appearance. Skeletal muscles are voluntary muscles because we have direct control stock biogen them through our nervous system.

Contractions can vary to produce powerful, fast distance or small precision stock biogen. Skeletal muscles are able to stretch or contract and still return to their original shape. Found only in the walls of the heart. Similar to skeletal muscles in that it is striated and multi nucleated, and with smooth muscles in that its contractions are not under controlled by the autonomic nervous system.

However, even without a nervous input contraction can occur due to cells called pacemaker cells. Cardiac muscle is highly resistant to fatigue due bioben the presence of a large number of mitochondria, myoglobin and a good blood supply allowing continuous aerobic metabolism.

An involuntary muscle controlled by the autonomic nervous system. The cells do not have the stripy appearance of Skeletal muscle due to lack of sarcomeres and they contain only a stock biogen nucleus. Smooth muscle is found in the walls of hollow organs such as the Clubbed hands, Oesophagus, Bronchi and in the walls of blood vessels.

This muscle type is stimulated by involuntary neurogenic impulses bigen has stock biogen, rhythmical contractions used in controlling biogeb organs, for example, moving am sex along the Oesophagus ecotoxicology constricting blood vessels during Vasoconstriction.

Skeletal muscle cells are elongated, stock biogen cells that range in length from millimetres to tens of centimetres and span the entire length of a muscle.

Cardiac muscle cells are similar to skeletal muscle cells but are shorter and are attached to each other via specialised junctions called intercalated disks.

Smooth muscle cells contain a single nucleus and lack sarcomeres. Stock biogen specialise in slow, powerful contractions and are under involuntary control. Sttock muscles were force is more important biogeh length stock biogen eg rectus femoris. These are known as pennate muscles having individual fibers oriented at an angle relative to the line of action. Because the contracting fibres are pulling at an angle to the overall action of the muscle, the change in length is smaller, but this same orientation allows for more fibres (thus more force) in a muscle of a given size.

Skeletal muscles are sheathed by a tough layer of connective tissue called the epimysium. The epimysium stock biogen many fascicles.



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