Foreign material that invades the body

each of the two top chambers in the heart that receives blood into the heart

a fluid connective tissue made up of 55% plasma and 45% cellular components

process of blood clotting

Relaxation of the heart

recording of the electrical changes that occur in the myocardium during a cardiac cycle

An iron-containing protein in red blood cells that reversibly binds oxygen.

The two types of white blood cells that are part of the body's immune system

Thick middle muscle layer of the heart

Liquid part of blood

blood clotting

pump blood away from the heart - arteries

pacemaker of the heart

septum - Divides the right and left chambers of the heart

Contraction of the heart

What blood type is also known as the universal donor meaning it can be given to anyone

largest vein in the body

the two lower chambers of the heart, and they pump blood out to the lungs and body.

small veins