muscles structure

HideShow resource information

muscles structure

Describe the muscle structure of the sketetal muscles, going into each fibre 

and explain the terms -

skeletal muscle

myofibril

sarcoplasmic reticulum

1 of 6

muscles structure

Muscle Structure

Skeletal muscle is made up of thousands of cylindrical muscle fibres. the fibres are bound together by connect tissues through which run blood vessels and nerves.

Each muscle fibre contains

  • numerous thread-like myofibrils that are arranged like a telephone cable and run the entire length of the fibre
  • many mitochondria
  • an extensive network of interconnecting tubes call sarcoplasmic reticulum
  • many nuclei

Key terms

 Sketetal muscle -the muscle that cause our bodies to move

 Myofibril - part of muscle fibre, contains sarcomeres and the contractile proteins actin and myosin

Sarcoplasmic Reticulum- equivalent to the endoplasmic reticlum of cells. it forms a network of channels that spread out over the surface of the myofibril and acts as a store of calcium ions that when released initiate muscle contraction

2 of 6

change this

Skeletal muscle is made up of thousands of cylindrical muscle fibres. the fibres are bound together by connect tissues through which run blood vessels and nerves.

Each muscle fibre contains

  • numerous thread-like myofibrils that are arranged like a telephone cable and run the entire length of the fibre
  • many mitochondria
  • an extensive network of interconnecting tubes call sarcoplasmic reticulum
  • many nuclei

Key terms

 sketetal muscle-the muscle that cause our bodies to move

 myofibril- part of muscle fibre, contains sarcomeres and the contractile proteins actin and myosin

sarcoplasmic reticulum- equivalent to the endoplasmic reticlum of cells. it forms a network of channels that spread out over the surface of the myofibril and acts as a store of calcium ions that when released initiate muscle contraction

3 of 6

skeletal muscle

(http://training.seer.cancer.gov/images/anatomy/muscular/muscle_structure.jpg)

4 of 6

sliding filament theory

jern;s

5 of 6

motor unit

vkkkk

6 of 6

Comments

No comments have yet been made

Similar Physical Education resources:

See all Physical Education resources »See all Anatomy & physiology resources »