Medical Science

Bones
Bones protect our organs and provide suture and shape that the other cells of our body attached to.

Muscles
Muscles move parts of the body by pulling on bones. Muscles are attached to the bone by tendons. Muscles work in pairs called antagonistic muscles giving us more control over our bodies and our movements. Antagonistic muscles are on both sides of a joint of example your biceps and triceps, as our biceps on the top of our arm contract the triceps relax moving the arm up slowly. Then to move your arm back down your biceps relax then your triceps contract.

Blood
There are four composts in your blood, Red blood cells, white blood cells, Platelets and Plasma. White blood cells fight infections. Plates make blood clots when you cut your skin.

Joints
There are two types of joints in our bodies, ball and socket joint and hinge joint. An example of a ball and socket joint in the shoulder, and a hinge joint is your elbow joint. The difference between the two is that the hinge joint can only move in one direction while a ball and socket joint can move in most directions.

The make up of a joint -
At the end of each end of a bone there is a tough, smooth stuff called cartilage. Cartilage stoppes the bones from wearing away. Ligament hold the two bones in place. Synovial fluid keeps it slippery and is held in by synovial membrane.