1. Cardiovascular System Health

2. Cardiovascular System Why is it called a transport system? 1. Transportation of fuel -carries food and oxygen to cells 2. Transportation of wastes -carries waste back to liver & kidneys 3. Transportation of disease fighters -carries cells that fight disease 4. Transportation of hormones - carries hormones throughout the body

3. Cardiovascular System What is included in the Cardiovascular System? HEART BLOOD VESSELS Arteries,Veins,Capillaries BLOOD LUNGS

4. Cardiovascular System Heart - muscle that drives your circulatory system - size of your fist - Beats about 60-80 times a minute (resting heart rate)

5. Cardiovascular System Chambers of the Heart: Right Atrium Right Ventricle Left Atrium Left Ventricle

6. Cardiovascular System Flow of blood through the heart: From the body Right Atrium-–un-oxygenated blood Right Ventricle Pulmonary Artery Lungs Left Atrium- oxygenated blood Left Ventricle Aorta -Body

7. Cardiovascular System Blood Vessels Arteries – largest blood vessels that take oxygenated blood(bright red) away from the heart. Has 3 layers, thick elastic walls The largest is the aorta.

8. Cardiovascular System Veins – Carries oxygen-poor (dark red)blood back to the heart from body cells Has 3 layers Thin, only slightly elastic Has one way valves that help blood flow in one direction Muscles of the body help to squeeze the veins and move the blood back to the heart

9. Capillaries Thinnest blood vessels In capillaries: ◦ Oxygen leaves blood to enter body cells ◦ Carbon dioxide leaves body cells to enter blood

10. Cardiovascular System Blood 4 Parts of your blood: 1. Plasma - Liquid 2. Red blood cells – Oxygen carrier 3. White blood cells – Disease fighters 4. Platelets – Helps blood clot, or thicken

11. Cardiovascular System Common problems: High Blood Pressure – to much force on the walls of the blood vessels Anemia – person who does not have enough red blood cells Hemophilia – disease where the blood clots little or not at all Arteriosclerosis – hardening of the arteries

12. Calculating Heart Rate Resting Heart Rate (RHR) ◦ Keep track of your pulse for 15 seconds ◦ Multiply the beats of your pulse by 4 ◦ EX: 23 X 4 = 92 Beats/Min Max HR ◦ 220 – Age ◦ EX: 220 – 11 = 209 Beats/Min Target Heart Rate (THR) ◦ 60 – 85% of Max HR ◦ EX: 209 X (.6) – 209 X (.85) = (126 – 178) Beats/Min

13. Cardiovascular System-Taking Your Pulse You can check your pulse wherever there is an artery running under your skin Each beat is caused by a contraction (squeezing) of the heart