Cardiovascular System Health Mrs. Wagner

Cardiovascular System Pathway through which blood can carry materials throughout the body (NC) Blood - Brings oxygen, nutrients and other necessary materials to your body cells - Carries waste products away - regulates body temperature and water balance

Heart Muscular organ that pumps blood throughout your body (NC) Size of your fist Located near middle of chest Each minute – pumps 5qts. of blood through blood vessels

Structure of Heart Septum – thick wall that separates the left and right side (NC) Each side has 2 chambers 1. Atrium – receives blood entering heart (NC) 2. Ventricle – chamber that pumps blood from the heart to the rest of the body (NC) - blood flows from each atrium into ventricles Right Side Blood to lungs Left Side Rest of body

Circulation Pulmonary Circulation – pathway that blood follows from the heart to the lungs (NC) Systemic Circulation – route that blood travels from the heart to most of the body and then back to the heart (NC)

Right Side of Heart Blood from most of the body flows into Contains carbon dioxide – little oxygen Passes from right atrium into right ventricle pumps into lungs passes through lungs gains oxygen CO2 leaves blood passes into the air in lungs

From Lungs Oxygen rich blood returns to left side from lung Left ventricle pumps blood to the farthest points of the body Oxygen passes from the blood to body tissues and CO2 moves from tissues to the blood Oxygen poor blood then returns to the right side of the heart

Blood Vessels Arteries – thick walled, elastic vessels that carry blood AWAY from the heart (pulmonary circulation) (NC) Aorta – largest artery in the body (Systemic circulation ) (NC) * Blood leaves the left ventricle through aorta branches into many smaller arteries brain, stomach, kidney, bones, muscles, etc.

Coronary Arteries – carry blood to the heart muscles ( NC) Arterioles – smaller blood vessels that form in an organ or a tissue (NC) Capillaries – smallest blood vessels in your body – pass through single file (NC) Venules – small blood vessels that join together to form veins (NC) Veins – large, thin walled elastic vessels that carry blood TO THE heart – valves prevent from flowing backwards (NC)

Blood Pressure Force with which blood pushes against the walls of the blood vessels (NC) - varies depending on activity - average – teens – 120/80 Systolic Pressure – force caused by the surge of blood that moves as a result of the contraction of the ventricles ( first & highest number (NC) Diastolic Pressure – force recorded when the ventricles are relaxed (NC)

Heartbeat Pacemaker – group of cells that help regulate the rate at which the heart beats and contracts ( NC) Artificial are added