General Heart

• The heart has two atria and two ventricles
• Each half of the heart is divided by a muscular wall called a septum
• Vena cava


  Main vein that brings deoxygenated blood back to the heart
• Blood flows from the right side to the left side of the heart through the septum.
• The heart has four chambers - two atria (upper) and two ventricles (lower).
• The heart is located between the lungs, behind the sternum.
• Pulmonary artery carries deoxygenated blood away from the heart to the lungs.
• Atrioventricular valves prevent backward flow of blood between the atria and ventricles.
• The heart pumps blood around the body via arteries, capillaries, and veins.
• Arteries carry oxygenated blood away from the heart.
• Capillaries are tiny vessels where gas exchange occurs with cells.
• Veins return deoxygenated blood back to the heart.