Heart Pump blood around the body The heart is a hollow, muscular organ divided by a vertical wall called the septum Two chambers are further divided into the thin walled atrium above, and a thick walled ventricle below, making four chambers Each pair of chambers are valves preventing any back flow of blood
Blood vessels Blood vessels leaving the heart generally carry oxygenated blood through vessels known as arteries Blood vessels that return blood to the heart are known as veins which generally carry de-oxygenated blood to the heart Can you think of any other blood vessels?
Blood Carries oxygen around the body to living cells Carries carbon dioxide to the lungs Fights infection What types of blood cells fight infection? Platelets-clot the blood
Transport Oxygen from the lungs to the cells Carbon dioxide from the cells to the lungs Nutrients to the cells Waste material from the cells Heat from various cells
Regulates Body temperature Salts Water content in the cells
Protect Blood prevents loss by clotting and combats toxins
Back to the Heart The heart is a DOUBLE PUMP: 1st - blood is pumped to the lungs & returns to the heart, 2nd - blood is pumped to respiring muscles & back to the heart again.
. 1. Deoxygenated 2. The blood blood is pumped receives oxygen and from the heart to the is pumped back to lungs the heart4. The oxygenleaves the blood tobe used for 3. The oxygenatedrespiration in the blood is thenbody and the blood pumped to the restgoes back to the of the bodyheart
Right Atrium The right atrium is one of four chambers (two atria and two ventricles). It receives deoxygenated blood from the vena cava, and pumps it into the right ventricle through the tricuspid valve
Right Ventricle It receives deoxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery
Pulmonary Artery The pulmonary arteries carry deoxygenated blood from the heart to the lungs. It then branches into two pulmonary arteries (left and right), which deliver de-oxygenated blood to the corresponding lung Here the blood gives up carbon dioxide and takes on a fresh supply of oxygen
Pulmonary Vein The pulmonary vein is a large blood vessel that carries blood from the lungs to the left atrium of the heart. In humans there are four pulmonary veins, two from each lung.
Left Atrium The left atrium is one of the four chambers in the human heart. It receives oxygenated blood from the pulmonary veins, and pumps it into the left ventricle.
Left Ventricle The left ventricle is one of four chambers (two atria and two ventricles) in the human heart. It receives oxygenated blood from the left atrium, and pumps it into the aorta
Aorta is the largest artery in the body, originating from the left ventricle of the heart. It branches off into two smaller. The aorta distributes oxygenated blood to all parts of the body.
Vena Cava The Vena Cava are the veins that return deoxygenated blood from the body into the heart. They both empty into the right atrium. And so on and so on...........