Skeletal muscle
Skeletal muscle is a form of "striated" (striped) muscle tissue. It is under the voluntary control of the somatic nervous system (means it can be controlled using the conscious mind). Most skeletal muscles are attached to bones by bundles of collagen fibers that are known as tendons. It is one of three muscle types, the others being cardiac muscle and smooth muscle.
| Skeletal striated muscle/ Striated voluntary muscle | |
|---|---|
| File:Muscles anterior labeled.png Skeletal muscles, viewed from the front | |
| File:Muscle posterior labeled.png Skeletal muscles, viewed from the back | |
| Details | |
| Identifiers | |
| Latin | muscularis striatus skeletalis |
| TH | |
| TE | |
| FMA | |
| Anatomical terminology | |
Skeletal muscle is made up of individual muscle cells or myocytes, known as muscle fibres. Muscle fibres do the work when muscles contract. A great deal is known about their structure and how they work. They contract when they get a nerve impulse.
Muscles provide strength, balance, posture, movement, and heat for the body to keep warm.[1]
Skeletal Muscle Media
Muscle types by fiber arrangement
Types of pennate muscle. A – unipennate; B – bipennate; *C – multipennate
- Denervation atrophy - atp94 - intermed mag.jpg
ATPase staining of a muscle cross section. Type II fibers are dark, due to the alkaline pH of the preparation. In this example, the size of the type II fibers is considerably less than the type I fibers due to denervation atrophy.
- Sarcomere.gif
Structure of muscle fibre showing a sarcomere under electron microscope with schematic explanation
Diagram of sarcoplasmic reticulum with terminal cisternae and T-tubules
- Gray20.png
Human embryo showing somites labelled as primitive segments
- Levers in the Skeletal Muscular System.png
Classes of levers present in the human skeletal muscular system
- 1006 Sliding Filament Model of Muscle Contraction.jpg
When a sarcomere contracts, the Z lines move closer together, and the I band becomes smaller. The A band stays the same width. At full contraction, the thin and thick filaments overlap.
- 1008 Skeletal Muscle Contraction.jpg
Contraction in more detail
Related pages
References
- ↑ Mescher AL, Junqueira LC (2013-02-22). Junqueira's basic histology : text and atlas (Thirteenth ed.). New York. ISBN 9780071807203. OCLC 854567882.