Muscles and Bones

Bones are made from different types of tissue. The outer layer is made from a thick, rigid and hard tissues. This means that bones can't bend and are tough. However, inside they are made from a more spongy tissue, but it is still strong. This is called bone marrow. The skelenton has four main purposes:

1. Protection of vital organs

2. Support for us

3. Production of red blood cells via the bone marrow

4. Movement of muscles and joints

Muscles are attached to bones via tough bands called tendons. When a muscle contracts, it applies a force to the bone it is attached to, which makes the bone move. Muscles are found in pairs called antagonistic muscles. One muscle pulls while the other contracts. Biceps and triceps are examples of antagonistic muscles.