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Circulatory system

Circulatory system. Learning objectives. Identify the main functions of the circulatory system. Diagram the flow of blood through the heart and body. Compare and contrast the major components of the blood. Circulatory function. Blood carries oxygen and nutrients to the cells.

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Circulatory system

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  1. Circulatory system

  2. Learning objectives • Identify the main functions of the circulatory system. • Diagram the flow of blood through the heart and body. • Compare and contrast the major components of the blood.

  3. Circulatory function • Blood carries oxygen and nutrients to the cells. • Blood carries carbon dioxide away from the cell. • The circulatory system circulates important cells that are part of the immune system. • The circulatory system distributes heat throughout the body.

  4. Blood vessels • Arteries carry oxygen-rich blood away from the heart. • Veins carry oxygen-poor blood back to the heart. • Capillaries are microscopic blood vessels that are involved in exchange.

  5. Diagram of the heart

  6. Heart mechanics • The heart is a muscle and movement alternates between contraction and relaxation. • Heart beat is controlled by a group of cells called the pacemaker. • Blood pressure measures the pressure exerted against the blood vessel walls during contraction (sistole), and when the muscles relax (diastole).

  7. Blood flow diagram

  8. Blood components • Blood is made up of plasma, red and white blood cells, and platelets.

  9. Blood types • There are 4 human blood types – A, B, AB, and O. • Blood type is determined by a marker molecule and antibody on the red blood cell.

  10. http://www.youtube.com/watch?v=D3ZDJgFDdk0

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