Ch 19 Circulatory System

Heart Muscular pump that circulates blood throughout the body and lungs Consists of 4 chambers Distribute oxygen, carbon dioxide, water and other nutrients to cells in the body

Atria 2 upper chambers of the heart Right atrium Left atrium Atriu m

Right Atrium The right upper chamber of the heart. It receives oxygen-poor blood from the body through two major veins superior vena cava inferior vena cava

Left Atrium The left upper chamber of the heart. It receives oxygen-rich blood from the lungs from the pulmonary vein. Left lung Right lung

Ventricles V 2 lower chambers of the heart Right Ventricle Left Ventricle V entricle

Right Ventricle The right lower chamber of the heart. It pumps the blood through the pulmonary artery to the lungs. Left lung Right lung

Left Ventricle The left lower chamber of the heart. It pumps the blood through the aortic valve into the aorta.

Septum the muscular wall that separates the left and right sides of the heart. O2 Poor O2 Rich

ANY blood vessel that moves blood AWAY from the heart Artery ANY blood vessel that moves blood AWAY from the heart

ANY blood vessel that moves blood Vein ANY blood vessel that moves blood TOWARDS from the heart

Capillary A blood vessel that is ONE cell thick Connects arteries and veins Oxygen and carbon dioxide easily diffuse for gas exchange LUNGS

Valve It prevents the back-flow of blood

Superior Vena Cava a large vein that carries oxygen-poor blood to the right atrium from the upper parts of the body.

Inferior Vena Cava a large vein (a blood vessel carrying blood to the heart) that carries oxygen-poor blood to the right atrium from the lower half of the body.

Pulmonary Vein the blood vessel that carries oxygen-rich blood from the lungs to the left atrium of the heart. Right Lung Left Lung

Pulmonary Artery The blood vessel that carries oxygen-poor blood from the right ventricle of the heart to the lungs.

Aorta Superior Vena Cava Pulmonary Artery Valve Pulmonary Vein Right UPPER BODY Aorta Superior Vena Cava Pulmonary Artery Valve CO2 + H20 CO2 + H20 O2 Pulmonary Vein O2 Right Atrium LEFT LUNG RIGHTLUNG Left Atrium 1 Valve Left Ventricle Valve Right Ventricle Inferior Vena Cava Septum