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The Circulatory System

The Circulatory System. The 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 about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times. .

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The Circulatory System

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  1. The Circulatory System

  2. The 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 about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times. - Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body. Even at rest, the muscles of the heart work hard—twice as hard as the leg muscles of a person sprinting

  3. - The heart pumps about 1 million barrels of blood during an average lifetime—that's enough to fill more than 3 super tankers

  4. The Circulatory 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

  5. Composition of Blood • Plasma (55%) • Water with dissolved substances • Proteins, sugars, amino acids, salts, hormones • Cells (45% of whole blood) • Red Blood Cells : Carry Oxygen • White blood cells: responsible for immune system, fight infection • Platelets : responsible for clot formation (coagulation)

  6. Composition of Blood

  7. The Heart • Hollow muscle • Separated into two sides that do not communicate with each other but are separated by a partition • Contraction of the heart muscle is what causes blood to circulate through the body • Valves keep blood from moving backwards

  8. The Four Chambers OfThe Heart SYSTEMIC CIRCULATION PULMONARY CIRCULATION

  9. Blood Circulation

  10. Systemic Circulation Left Atrium:Takes oxygen-rich blood from the lungs and pumps it into the left ventricle Left Ventricle:Pumps the oxygen-rich blood through the aorta which sends it out into the body

  11. Pulmonary Circulation Right Atrium:Takes the used blood from the body that no longer has oxygen and pumps it into the right ventricle Right Ventricle:Pumps the oxygen-less blood into the lungs where it picks up oxygen again

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