Main Functions 1 2 3 4 Transports oxygen

Main Functions 1) 2) 3) 4) Transports oxygen to the cells from the lung Transports carbon dioxide from cells to the lung Transports essential nutrients to the cells Carries wastes from cells

3 Types of Circulation 1) cardiac circulation—circulation of blood within the heart 2) pulmonary circulation—from heart to lungs back to heart 3) systemic circulation—from heart to body back to heart

The 3 main parts of The Circulatory system 1) Blood 2) The Blood Vessels 3) The Heart

The Composition of Blood The Plasma (Fluid) makes up 55% of the blood volume. The Solids (Cells) make up 45% of the blood volume.

Blood Plasma 97% Water Other 3% -Antibodies and Proteins - Nutrients and Wastes

Blood Solids Red Blood Cells -Carry oxygen -Contain Hemoglobin White Blood Cells -Attack bacteria & other invaders Platelets -Control the blood clotting process https: //www. youtube. com/watch? v=--b. ZUeb 83 u. U

VESSELS

Types of Blood Vessels Arteries - carries blood away from the heart - usually oxygenated (one exception) Veins - carries blood towards the heart - deoxygenated (one exception) Capillaries -connect arteries/arterioles to veins/venules - exchanges carbon dioxide oxygen nutrients waste Exceptions: i) Pulmonary artery – artery leading from heart to lung (deoxygenated) ii) Pulmonary vein – vein leading from lung to heart (oxygenated)

Overview of Blood Vessels Artery Arterioles Capillaries Venules Veins

Parts of The Heart The Atria (or Atriums) -Receiving Chambers The Ventricles -Pumping Chambers The Valves -Prevents backflow The Septum -Divides the Heart Contraction and Blood Flow Animation: http: //www. nhlbi. nih. gov/health/dci/Diseases/hhw_pumping. html

ANATOMY OF THE HEART