Atrium
One of two upper chambers of the heart
Circulate
To move in in a repeated
Ventricle
One of two lower chambers of the heart
Valve
A flap of tissue that prevents the back flow of blood
Deoxygenated
Lacking oxygen
Oxygenated
Rich in oxygen
Plasma
The liquid portion of the blood
Red blood cell
A cell that delivers oxygen to body cells
White blood cell
A cell that defends the body against diseases
Platelet
A cell fragment that helps clot the blood
Cardiovascular system
The system of vessels and organs that transport materials around the body