Circulatory system


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Circulatory system

  1. 1. The Circulatory System
  2. 2. The Cold Heart Facts- The heart is a muscle- The heart is a little larger than your clenched fist- Your heart beats about 100,000 times in one day and about35 million times in a year. During an average lifetime, thehuman heart will beat more than 2.5 billion times.- Give a tennis ball a good, hard squeeze. Youre using about thesame amount of force your heart uses to pump blood out to thebody. Even at rest, the muscles of the heart work hard—twice ashard as the leg muscles of a person sprinting
  3. 3. - The heart pumps about 1 million barrels of blood duringan average lifetime—thats enough to fill more than 3 supertankers
  4. 4. The Definition The bodily system consisting of the heart, blood vessels, and blood that circulates blood throughout the body, delivers nutrients and other essential materials to cells, and removes waste products -- Also called the cardiovascular system.
  5. 5. The Circulatory System AKA the cardiovascular system What it consists of: - Heart - Blood Vessels - Blood What it does: - Circulates blood throughout the body - Delivers nutrients to cells - Removes waste products from cells
  6. 6. The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system. Circulation Travels through pulmonary arteriesTwo parts to lungs where it gets fresh oxygenHeart acts as double pump and becomes bright redBlood from the right side Blood from lungs throughpump is dark red and low in pulmonary veins back to the heartsoxygen (oxygen-poor) left side pump Pumped out into the body
  7. 7. 3 Kinds of Circulation:Pulmonary circulationCoronary circulationSystemic circulation
  8. 8. Pulmonary CirculationMovement of blood from the heart, to the lungs, and back to the heart again
  9. 9. Coronary CirculationMovement of blood through the tissues of the heart
  10. 10. Systemic Circulation Supplies nourishment to all of the tissue locatedthroughout the body, except for the heart and lungs
  11. 11. The Heart A hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation.
  12. 12. The Four Chambers Of The Heart 3. Takes the used blood 1. from the body that no Takes oxygen-rich blood from the longer has oxygen and lungs and pumps it into the left pumps it into the right ventricle ventricle 4. 2.Pumps the oxygen-lessblood into the lungs where itpicks up oxygen again Pumps the oxygen-rich blood through the aorta which sends it out into the body
  13. 13. Blood Vessels- The part of the circulatory system that transportsblood throughout the body.
  14. 14. Three Types of Blood Vessels1) Arteries: carry oxygen-richblood away from the heart Artery2) Veins: carry blood containingwaste products to differentorgans (kidneys, liver, etc.) and Capillariesthen back to the heart3) Capillaries: enable the actualexchange of water and chemicalsbetween the blood and thetissues – for Veinexample…diffusion of oxygenwithin the lungs
  15. 15. The Aorta The largest artery in the body, originating from the left ventricle of the heart and extending down to the abdomen, where it branches off into two smaller arteries. The aorta distributes oxygenated blood to all parts of the body.
  16. 16. BloodThe fluid that circulates in the heart, arteries, capillaries, andveins of a vertebrate animal carrying nourishment and oxygento and bringing away waste products from all parts of the body.
  17. 17. The Bloody Truth Blood consists of: - Red blood cells: disk shaped cells that carry oxygen to cells and carbon dioxide out - White blood cells: cells that engulf and digest bacteria and fungi; an important part of the bodys defense system - Platelets: are blood cells that help stop bleeding. - Plasma: straw-colored liquid component of blood. It is mostly water (93% by volume) and contains dissolved proteins, glucose, clotting factors, mineral ions, hormones and carbon dioxide
  18. 18. The Lymphatic System 6.)– a systemof transporting vesselsdesigned to collect fluid& proteins that leak outof the capillaries andreturn them to theblood stream proper.***(note – the “fluid collection” system of the body)
  19. 19. Fluid (mostly water) leaks out of the capillaries due to the highpressure within the blood vessels (arteries & capillaries). That fluid needs to be recovered and returned to the blood volume or it will build up in the tissue spaces. Muscle movements and the force produced by the heart “run” the lymphatic system.(***note – this is the lymphatic systems connection to the circulatory system)
  20. 20. Blood is the main transport mediumof the body. It “carries” everythingwe need for life from one point in thebody to another. Because of this, bloodis considered the most important factorin maintaining homeostasis.
  21. 21. 1.) Blood transports oxygen (O2) from the lungs to the cells of the body.2.) Blood transports carbon dioxide (CO2) from the cells of the body to the lungs.3.) Blood transports nutrients from the digestive tract to the cells of the body.4.) Blood transports waste products from the cells of the body to the liver & kidneys.
  22. 22. 5.) Blood transports water (H2O) from the digestive tract to the cells of the body.6.) Blood transports white blood cells & antibodies to fight infection.7.) Blood transports platelets & fibrin to form clots which begins healing.8.) Blood transports hormones from their production sites to target sites elsewhere in the body.
  23. 23. 9.) Blood transports heat from the muscles of the body to the surface of the skin & the lungs.10.) Blood transports the body’s buffering system which allows the body to resist pH changes.
  24. 24. A Healthy Heart is a Happy Heart 1. Exercise on a regular basis. Get outside and play. Keep that body moving (walk, jog, run, bike, skate, jump, swim). 2. Eat Healthy. Remember the Food Pyramid and make sure your eating your food from the bottom to top. 3. Dont Smoke! Dont Smoke! Dont Smoke! Dont Smoke! Dont Smoke!
  25. 25. Video
  26. 26. HomeworkOption 1) Write an essay that details a day in the life ofa red blood cell as it travels through the circulatorysystem … where did you go and what happenedOption 2) Draw the circulatory system and point outthe three different types of blood vessels, the heart andits chambers, the lungs, and red blood cells.