1. BY EWEN MUNRO AND STRUAN CAIRNS
The Muscle system BY
EWEN MUNRO AND STRUAN CAIRNS

2. The muscular system There are 639 muscles in the human body
At the end of each muscle is a tendon which attaches muscle to bone.
Each muscle has an origin and insertion
The origin is fixed, the insertion moves.
The muscle system is made of 6 trillion fibres – each thinner than a human hair
A fibre can support 1000 times its own weight.

3. What is muscle Muscle is a soft tissue found in animals and humans
Muscle cells contain proteins that slide past one another, producing a contraction that changes both the length and the shape of the cell, which gives movement
Muscle tissues are made from cells in a process known as myogenesis.
There are three types of muscle, skeletal, striated, cardiac (your heart), and smooth.

4. An individual muscle Skeletal muscle is made of:-
muscle cells – fibres,
connective tissue – facia
nerves and blood vessels
Like an orange segment – facia encloses the muscle

5. Types of skeletal muscle
Flat muscle (abs)
Triangular (shoulder blade)
Fusiform (biceps)
Strap muscle (legs)
Unipennate (shins)
Multibennate (shoulder)

6. Functions of a muscle All muscles can contract and relax
Gives elasticity and power to move
Muscle contains blood vessels to supply food and oxygen
Muscles contain nerves which stimulate the tissue and send messages to the brain

7. Why we need muscle We could not move without them
We could not stand without them
They keep us alive
They protect our bones
They make us strong