Members of the Cardiovascular System Heart Blood Vessels Blood
Click here to see it in action! The Heart Muscular (cardiac muscle) organ in chest 2 pumps (Right and left side) Work together to move blood all around your body Each side has a top (Atrium) and a bottom (ventricle) 4 chambers of heart Heart muscles contract push blood from the heart to the blood vessels
Key Parts Right Atrium RA Right Ventricle RV Left Atrium LA Left Ventricle LV Aorta Vena Cava Pulmonary Artery PA Pulmonary Vein PV
Blood Vessels Arteries Veins Capillaries Carry blood AWAY from heart Full FedEx Trucks travel on here Veins Carry blood back TO the heart Empty FedEx Truck travel on here Capillaries Teeny, tiny blood vessels that connect to arteries and veins Nutrients and gas can pass through the capillaries from the blood to the cells that need them
Circulation Is Like FedEx Delivery Service Oxygen molecules packages everyone is ordering from their homes (tissues all over the body) Lungs Warehouses with the packages (oxygen) Tissues individual homes, placing orders for the oxygen Heart the distribution center of the body with the trucks needed to pick up packages from lungs and then deliver them to tissues that directs trucks (RBCs) Red Blood Cells (RBCs)delivery trucks carrying packages they are either full of packages to deliver or empty Arteries and Veins ONE-WAY roads trucks travel on Clogged arteries, plaque build up Traffic Jams/lane closures/road blocks
Flow of Blood RBCs go from RA to RV thru Pulmonary Arteries to LUNGS to pick up oxygen
Flow of Blood Oxygenated blood enters LA, then the LV and then gets sent through the AORTA to deliver oxygen to tissues
Flow of Blood Oxygen and nutrients travel from ARTERIES thru CAPILLARIES to cells Deoxygenated blood and Waste (CO2) leaves cellscapillariesveins to be carried back to heart (to be sent back to lungs to pickup more oxygen)
Flow of Blood Waste and deOXY blood enter RA, the RV and then get get pumped out of the PULMONARY ARTERY to the lungs to get OXYGEN need to go to factory to pick up more packages
Flow of Blood Blood now has oxygen and returns to the heart through the PULMONARY VEIN to the LA, then LV, then back through the AORTA to start delivering more oxygen
Factors That Affect Blood Flow Heart Rate Beats per minute (bpm) Avg. adult at rest: 60-100 bpm Exercise, stress, chemicals increases bpm
Blood Pressure The force of the blood pushing against the walls of the arteries Your blood pressure is at its highest when the heart beats, pumping the blood. This is called systolic pressure. When the heart is at rest, between beats, your blood pressure falls. This is the diastolic pressure. Each time the heart beats (about 60-70 times a minute at rest), it pumps out blood into the arteries.
Cardiovascular Disease Causes Heart attack and stroke are two main causes of death resulting from the following conditions: Atherosclerosis Condition in which fatty deposits called PLAQUE build up on the inner walls of arteries Results in blood clots High Blood Pressure Condition where heart and blood vessels are being overworked HYPERTENSION Leads to other diseases
Atherosclerosis Plaque is made up of fat, cholesterol, calcium, and other substances found in the blood. Over time, plaque hardens and narrows your arteries This limits the flow of oxygen-rich blood to your organs and other parts of your body Leads to blood clots, heart attack, stroke and DEATH
Causes and Prevention of Atherosclerosis Certain traits, conditions, or habits may raise your risk for the disease…called RISK FACTORS Uncontrollable RISK FACTORS Age Family History of heart disease Controllable RISK FACTORS Physical Activity Smoking Unhealthy diet MAIN TREATMENT for atherosclerosis: lifestyle changes medicines and medical procedures
Hypertension TWO WAYS To create High Blood Pressure (Hypertension) Extra fluid in the body increases the amount of fluid in blood vessels and makes blood pressure higher Infection/disease Narrow, stiff, or clogged blood vessels also raise blood pressure Due to plaque build up