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The Circulatory System AKA The Cardiovascular System AKA The Body’s “Transport System”

The Circulatory System AKA The Cardiovascular System AKA The Body’s “Transport System”. Consists of the heart, blood and blood vessels. The components are . . . . Heart Blood vessels 3. Blood. Used to 1. carry needed substances to cells and

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The Circulatory System AKA The Cardiovascular System AKA The Body’s “Transport System”

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  1. The Circulatory SystemAKA The Cardiovascular System AKA The Body’s “Transport System” • Consists of the heart, blood and blood vessels.

  2. The components are . . . • Heart • Blood vessels • 3. Blood

  3. Used to 1. carry needed substances to cells and 2. carry waste products away from cells. And your blood 3. contains cells to fight disease.

  4. Needed Substances: oxygen glucoseWaste Products: Carbon DioxideDisease Fighters: white blood cells

  5. The Heart: 2 pumps; 4 sections • The size of your fist. • Located in the center of your chest. • With each beat, blood is being pushed through the blood vessels.

  6. Identify the blood vessels in the heart. 1. Vena Cava 2. Aorta 3. Pulmonary Artery 4.Pulmonary Vein

  7. Flow of blood: • Oxygen depleted blood • Oxygenated blood

  8. Vena cava • Right atrium • Right ventricle • Pulmonary Artery (Arteries Away!) • To lungs • In the lungs: CO2 is exchanged for O2. Oxygenated blood goes back to the heart. • Pulmonary veins (veins IN) • Left atrium • Left ventricle • Aorta (largest artery) • To the body This process keeps going in a circle…it’s not called the Circulatory System for nothing!

  9. Blood Vessels: Arteries: (Arteries Away!) carry blood __________ from the heart. Carries oxygen rich blood (1 exception=Pulmonary artery). Have thick elastic walls made of smooth muscle. Each ventricle is attached to an artery. Arteries branch into capillaries.

  10. Veins: (veins IN) Carry blood in to the heart. Low pressure, Near skin surface. Thin walls. Oxygen poor (1 exception=Pulmonary vein) Have valves to prevent backflow.

  11. Capillaries Microscopic. One cell thick. Only one blood cell through at a time. Where all diffusion happens.

  12. PARTS OF BLOOD • 45% OF BLOOD IS MADE OF CELLS; THE REST IS PLASMA.

  13. PLASMA: • Straw-colored, liquid part of blood. 10% are the dissolved materials that must travel via the blood, the other 90% is water. Carries most of the CO2 in the blood.

  14. RED BLOOD CELLS • Take up oxygen in the lungs and deliver it to cells. Produced in the bone marrow. Thin, disk-shaped and flexible. Live for about 120 days.

  15. HEMOGLOBIN: • Iron-containing protein that gives blood its ability to carry oxygen. When hemoglobin combines with O2, blood turns bright red.

  16. WHITE BLOOD CELLS • Body’s disease fighters. There are fewer WBCs than RBCs. WBCs are bigger than RBCs. Can live for months or even years

  17. PLATELETS • Small pieces of cells help the blood to clot. They produce a protein called fibrin that weaves tiny fibers across a cut and traps blood cells. • A scab is simply a dried blood clot.

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