Carbon Dioxide		Vessels that empty into the capillary bed
Right Atrium		Vessel by which deoxygenated blood leaves the heart
Pulmonary Artery		Room air is 21% this
Pulmonary Vein		Route by which oxygenated blood returns to the heart
Deoxygenated		Separates the left ventricle from the aorta
Aorta		Organs that take in oxygen and give off carbon dioxide
Bicuspid Valve		Nature of blood as it returns to the heart from the body
Four		Separates the right atrium from the right ventricle
Oxygenated		First chamber of the heart
Venules		Separates the right ventricle from the pulmonary artery
Pulmonary Valve		Get larger as they approach the heart
Arterioles		Has two leaves or flaps
Venules		Smallest arteries in the body
Capillaries		Empties into the top portion of the right atrium
Left Ventricle		Smallest veins in the body
Four		Nature of blood as it returns to the heart from the lungs
Aortic Valve		Empties into the lower portion of the right atrium
Superior Vena Cava		Waste product of metabolism
Lungs		Pulmonary veins empty into this
Arterioles		Number of chambers in the heart
Left Atrium		Largest artery in the body
Tricuspid Valve		Get smaller as they get farther away from the heart
Arteries		Number of valves in the heart
Oxygen		Powerhouse of the heart...strongest of all chambers
Inferior Vena Cava		Place at which gas exchange occurs
Right Ventricle		Capillaries drain into these small vessels
Veins		Tricuspid valve opens into this