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Circulation

Circulation. Your body resembles a large roadmap, There are routes or “arteries” that take you downtown to the “heart” of the city. Functions. Transport oxygen and carbon dioxide Distribute nutrients Transport wastes Distribute hormones Regulate body temperature.

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Circulation

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  1. Circulation • Your body resembles a large roadmap, There are routes or “arteries” that take you downtown to the “heart” of the city.

  2. Functions • Transport oxygen and carbon dioxide • Distribute nutrients • Transport wastes • Distribute hormones • Regulate body temperature

  3. 3 Major Parts of the Circulatory system • Blood Vessels- routes blood travels • Heart– pumps or pushes blood through body • Blood– carries important “ *stuff ” through body * Stuff – includes oxygen, food, & waste

  4. Blood Vessels One Way Streets

  5. Blood Vessels resemble very long and skinny tunnels that are all through your body.

  6. Blood Vessels • Arteries/arterioles– have smooth muscle in walls, take blood away from the heart. http://learn.fi.edu/learn/heart/vessels/arteries.html • Capillaries– very small, place where most gas exchange occurs http://learn.fi.edu/learn/heart/vessels/capillaries.html • Veins/venues – have valves, no muscle, take blood toward the heart • http://learn.fi.edu/learn/heart/vessels/veins.html

  7. The Heart

  8. Dub Lub If you listen to your heartbeat, it makes a lub dub sound. The lub is when blood is pushed out of the heart into the body and the dub is the reloading of the heart with more blood ready to push it out to the body

  9. The Heart Cardiac cycle Systole – ventricle contraction Diastole – relaxation of all chambers following contraction of atria

  10. Blood’s Path Through the Heart - Deoxygenated • Vena cava • Right atrium • Right ventricle • Pulmonary Arteries • Lungs

  11. Blood’s Path Through the Heart - Oxygenated • Lungs • Pulmonary Veins • Left atrium • Left ventricle • Aorta • Body

  12. Influence on Heart Rate • Nervous system • Hormones

  13. Functions of Blood • Transport • Nutrients • Gasses • Hormones • Waste Products • Immune Response

  14. Blood Composition • Plasma 55-60% • Red blood cells – carry oxygen • White blood cells - immunity • Platelets – clotting ***Blood is mostly saltwater!***

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