Circulatory System
Circulatory System• The circulatory system is made up of two chains of  vessels  • Lymphatic circulation    • Drains inter...
Blood• Blood is the liquid that circulates through the blood  vessels  • Made up of a liquid part called plasma, as well a...
Blood Vessels• Three types of blood vessels  • Veins – These transport blood from the organs and parts of    the body to t...
Heart• The heart is a muscle divided into four chambers, two on the  left, two on the right, joined vertically  • The uppe...
Heart
Cardiac Cycle• Both atria contract to finish filling their corresponding  ventricles  • This movement is called atrial sys...
Blood Circulation• Pulmonary circulation  • Blood returns from the tissues of the entire body through the    two main vein...
Blood Circulation• Systemic circulation  • The blood in the left atrium goes to the left ventricle during    atrial systol...
Blood Circulation• Systemic circulation  • The blood in the left atrium goes to the left ventricle during    atrial systol...
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Circulatory system

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Circulatory system

  1. 1. Circulatory System
  2. 2. Circulatory System• The circulatory system is made up of two chains of vessels • Lymphatic circulation • Drains interstitial fluid (in which cells of tissues are immersed) • A liquid called lymph circulates through the vessels and transports interstitial fluid, and moves without the help of any organ • Blood circulation • Is responsible for transporting nutrients, oxygen, and waste. • The liquid, blood, circulates through the blood vessels, which are called arteries, veins, and capillaries • The movement of blood is driven by the heart
  3. 3. Blood• Blood is the liquid that circulates through the blood vessels • Made up of a liquid part called plasma, as well as: • Red blood cells – Most abundant. They are in charge of transporting oxygen molecules combined with the hemoglobin molecules they have inside • White blood cells – These cells belong to the immune system and use the blood circulation because blood vessels reach every part of the body and it is fast • Platelets - Cellular fragments produced in the bone marrow. Their purpose is to contribute to the formation of clots which cover wounds
  4. 4. Blood Vessels• Three types of blood vessels • Veins – These transport blood from the organs and parts of the body to the heart • Arteries – These transport blood from the heart to the organs and parts of the body • Capillaries - The arteries divide into arterioles as the blood vessel branches off • Capillaries are the exchanging areas between the blood and the tissues • The capillaries begin to join together again in venules which join others and return to the heart
  5. 5. Heart• The heart is a muscle divided into four chambers, two on the left, two on the right, joined vertically • The upper chambers are called atria (singular: atrium) and and the lower chambers called ventricles. • The right atrium is connected to the right ventricle through the tricuspid valve. The left atrium is connected to the left ventricle through the mitral valve• Pericardium – The membrane that covers external surface of the heart and protects it• The heart has two basic movements: • Contraction (systole) • Relaxation (diastole)
  6. 6. Heart
  7. 7. Cardiac Cycle• Both atria contract to finish filling their corresponding ventricles • This movement is called atrial systole• The ventricles contract and push blood through the main vessels leading from the heart (called ventricular systole) • These are the aorta artery, which starts the circuit of taking blood to the body, and pulmonary artery, which transports blood to the lungs to take oxygen and release carbon• All the cardiac muscle relaxes and all four cavities fill with blood again (called general diastole) • To prevent the blood that has just left the heart from returning, the aorta and the pulmonary artery have semilunar valves
  8. 8. Blood Circulation• Pulmonary circulation • Blood returns from the tissues of the entire body through the two main veins, the superior vena cava and the inferior vena cava. • The blood goes to the right atrium and then the right ventricle, and from there, goes out the pulmonary artery to exchanges gases (Carbon dioxide to oxygen) • Once oxygenated, the blood returns to the heart through the pulmonary vein, which takes blood to the left atrium
  9. 9. Blood Circulation• Systemic circulation • The blood in the left atrium goes to the left ventricle during atrial systole, and then gets distributed throughout the body through ventricular systole• Exchange of substances in the tissues • The capillaries are the little branches that reach the tissues • The blood plasma leaves the capillaries and mixes with the interstitial liquid. • Then the cells take the oxygen and nutrients contained in the plasma • The capillaries take back the liquid exiting the tissues and join the venules, and return to the heart
  10. 10. Blood Circulation• Systemic circulation • The blood in the left atrium goes to the left ventricle during atrial systole, and then gets distributed throughout the body through ventricular systole• Exchange of substances in the tissues • The capillaries are the little branches that reach the tissues • The blood plasma leaves the capillaries and mixes with the interstitial liquid. • Then the cells take the oxygen and nutrients contained in the plasma • The capillaries take back the liquid exiting the tissues and join the venules, and return to the heart

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