Circulatory System

1. Blood

1.1. 4 types

1.2. Components

1.2.1. Platelets

1.2.2. Red Blood Cells

1.2.3. White Blood Cells

1.2.4. Plasma

1.2.4.1. Liquid part of blood

1.2.4.1.1. Mostly made up of water

2. Problems of

2.1. Heart Disease

2.2. Stroke

3. Heart

4. Blood Vessels

4.1. Artery

4.2. Capillairies

4.3. Veins