CIRCULATORY SYSTEM

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CIRCULATORY SYSTEM

  1. 1. CIRCULATORY SYSTEM Celeste Roderno-Desingaño
  2. 2. Human Circulatory System <ul><li>Also known as the cardiovascular system </li></ul><ul><li>Responsible for transporting nutrients and gases carried by blood to all parts of the body. </li></ul><ul><li>Consists of heart and blood vessels. </li></ul>
  3. 3. Parts of the Circulatory System <ul><li>1. Heart </li></ul><ul><li>One of the toughest organ of the body </li></ul><ul><li>Size of a clenched fist </li></ul><ul><li>Weigh less than three quarter of a pound </li></ul><ul><li>Beats 72 times a minute with only a short rest between beats </li></ul><ul><li>Pumps about 520 quarts of blood, circulating all the blood through the body 37-43 times. </li></ul><ul><li>Pericardium – thin membrane covering the heart </li></ul>
  4. 4. Chambers of the Heart <ul><li>Right Atrium </li></ul><ul><li>Left Atrium </li></ul><ul><li>Right Ventricle </li></ul><ul><li>Left Ventricle </li></ul>
  5. 5. <ul><li>2. Blood Vessels </li></ul><ul><li>A. Arteries </li></ul><ul><li>Carry blood from the heart to the tissues </li></ul><ul><li>Walls: </li></ul><ul><li>Outer coat of connective tissue </li></ul><ul><li>Middle coat of smooth muscle cells </li></ul><ul><li>Inner coat of endothelium and connective tissue </li></ul><ul><li>Aorta – is the largest artery which is about 25 mm in diameter and has a wall about 3 mm thick. </li></ul>Parts of the Circulatory System
  6. 6. Parts of the Circulatory System <ul><li>B. Capillaries </li></ul><ul><li>These are microscopic, thin-walled vessels connecting arteries and veins </li></ul><ul><li>Permit the exchange of food, gases and waste between blood and tissues </li></ul><ul><li>Walls: </li></ul><ul><li>Single layer of cells- Endothelium </li></ul>
  7. 7. Parts of the Circulatory System <ul><li>C. Veins </li></ul><ul><li>Return blood from the tissues to the heart </li></ul><ul><li>Walls same as coats of arteries but thinner. </li></ul><ul><li>Supplied with valves along their length to prevent the back flow of blood. </li></ul>
  8. 8. <ul><li>Deoxygenated Blood from Tissues </li></ul><ul><li>Posterior and Inferior Vena Cava </li></ul><ul><li>Right Atrium </li></ul><ul><li>Tricuspid opens -------Atrium contracts </li></ul><ul><li>Right Ventricle------Ventricle contracts </li></ul><ul><li>Pulmonary arteries open </li></ul><ul><li>Lungs </li></ul><ul><li>Oxygenated Blood from Lungs </li></ul><ul><li>Pulmonary vein </li></ul><ul><li>Left Atrium </li></ul><ul><li>----------Bicuspid opens </li></ul><ul><li>----------Left Ventricle </li></ul><ul><li>Aorta Opens </li></ul><ul><li>Coronary arteries </li></ul><ul><li>Tissues </li></ul>Movement of Blood
  9. 9. Compatibility of Blood Types O A; B; AB; O O A; B; AB; O AB AB B; O B; AB B A; O A; AB A Can Accept Blood From Can Donate Blood To Blood Types
  10. 10. <ul><li>Rh+ ----- with Rh antigen </li></ul><ul><li>Rh- ----- without Rh antigen </li></ul><ul><li>Rh- mother and Rh+ Father = Rh+ fetus </li></ul><ul><li>Rh+ fetal blood can pass through the placenta and enter the maternal circulation </li></ul><ul><li>Rh- mother’s immune system can recognize the Rh+ fetus as foreign and therefore produces antibodies against it and destroy the fetus’ RBC = Anemia known as erythroblastosis fetalis or hemolytic anemia </li></ul>Rh Factor

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