Anatomy
The heart is composed by:
The Atrium or the Top that are two thin wall chambers that receive blood.
The Right atrium has sino atrial node or SAnode that is a cell that beats by itself and this makes heart beat.
The ventricle or the Bottom that are two thick walls where blood is pumped to lungs with smaller ventricle and to the body with bigger ventricle.
The valves that are between atrium and ventricle they make blood flow in one direction.
The Right side of the heart that is de oxygenated blood
And the Left side of heart that is oxygenated blood
The systematic circuit is composed by
The Systemic or body that give oxygen and nutrients to cells
The Pulmonary or the lung that receive oxygen
And The Hepatic or liver that receive nutrients
The Blood Vessels and Circulation are composed by
The Arteries that Carry blood away from heart.
The Capillaries that Exchange of gas and nutrients.
Veins that Carry blood to heart.
The red blood cells that are Erythrocytes that carry oxygen in hemoglobin.
The white blood cells that are Leukocytes that makes antibodies which attacks the enemy or antigens.
And the Platelets that are pieces of cells that stop bleeding
"Circulatory System: facts, function & diseases." Live Science. TeachMedia Network. Web. 23 Jan 2014. <http://www.livescience.com/22486-circulatory-system.html>.