the anatomy

• Arteries, capillaries and Veins are all blood vessels
• blood is 55% plasma, 45% red blood cells, and less than 1% of both Platelets and white blood cells
• the heart has four chambers; two atria (upper) and two ventricles (lower)
• plasma contains protein and gasses
• white blood cells fight infection and disease
• the tranchea is the windpipe leading to the lungs
• the alvei is the gas exchange in the lungs
• the broncos is the main passageway for air to the lungs where bronchioles branch off