2chapter37

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2chapter37

  1. 1. Ch 37 : The Circulatory System and The Heart <ul><li>The heart, a series of blood vessels, and the blood that flows through them are all a part of the circulatory system. </li></ul><ul><li>The heart: a hollow organ about the size of a closed fist. </li></ul>Naseme
  2. 2. Blood Vessels <ul><li>Three types of blood vessels, Arteries, Veins, and Capillaries. </li></ul><ul><li>Arteries bring blood from the heart to the muscle tissues, and it carries oxygen rich blood. </li></ul><ul><li>Veins carry oxygen poor blood back to the heart, but contains one way valves to keep blood from flowing the wrong way. </li></ul><ul><li>Capillaries bring nutrients and oxygen to tissues throughout the body, and takes carbon dioxide and waste products. </li></ul>Sydney
  3. 3. Content of Blood <ul><li>Blood consists of red blood cells, white blood cells, platelets, and plasma. </li></ul><ul><li>Red Blood Cells transfer oxygen throughout the body. </li></ul><ul><li>White Blood Cells attack foreign substances or microorganisms. </li></ul><ul><li>Platelets help clot blood using plasma proteins. </li></ul>Naseme
  4. 4. Sydney and Naseme
  5. 5. Lymphatic System <ul><li>The Lymphatic System collects fluids lost by the circulatory system and returns it. </li></ul><ul><li>Lymph nodes trap bacteria and microorganisms, they also hold white blood cells. </li></ul>Sydney
  6. 6. Respiratory System <ul><li>Contains: bronchi, trachea, larnyx, pharnyx, and nose. </li></ul><ul><li>The respiratory system controls the exchange of oxygen and carbon dioxide. </li></ul>Naseme
  7. 7. Breathing <ul><li>The diaphragm creates a slight vacuum in the chest cavity using the lungs and rib cage. </li></ul><ul><li>When you breathe in, your diaphragm contracts. </li></ul><ul><li>When you breathe out, it relaxes. </li></ul>Sydney
  8. 8. Gas Exchange <ul><li>Gas exchange is when carbon dioxide and oxygen rotate, causing a switch of places, in the capillaries. This is what happens in the bronchi. </li></ul>Naseme
  9. 9. Lung Diseases <ul><li>Smoking is a main cause of lung disease. </li></ul><ul><li>Second hand smoke also kills. </li></ul><ul><li>Smoking destroys your lungs, causing them to collect tar and other substances which make it hard to breathe. </li></ul>Sydney

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