bio terms (transport in man)

  1. Definition: Circulatory System
    Carries food and oxygen to all cells in the body ans also carries wastes away from the cells
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  3. Definition: Double Circulation
    Body -> vena cava -> right atrium -> right ventricle -> pulmonary artery -> lungs -> pulmonary veins -> left atrium -> left ventricle -> aorta -> body
  4. Function: (heart) left atrium
    Receives oxygenated blood from lungs via pulmonary veins
  5. Function: (heart) pulmonary veins
    carries oxygenated blood from the lungs to the heart
  6. Function: (heart) left ventricle
    pumps blood to all parts of the body except lungs via aorta
  7. Function: (heart) aorta
    • carries oxygenated blood
    • biggest artery (to withstand highest blood pressure because it is near to the heart)
  8. Function: (heart) bicuspid valves
    • prevent backflow of blood to left atrium
    • It opens because of blood pressure
  9. In summary about the left part of the heart
    • carries oxygenated blood
    • consists of pulmonary veins, bicuspid valves, aorta, left ventricles and atria
    • pumps blood to all parts of the body thus has thicker muscular walls than the right part
  10. Function: (heart) Right atrium
    Receives deoxygenated blood
  11. Function: (heart) right ventricle
    pumps blood to lungs via pulmonary artery
  12. Function: (heart) Pulmonary ARTERIES
    carries deoxygenated blood to lungs
  13. Function: (heart) tricuspid valves
    • prevent backflow of blood to the right atrium
    • It opens because of blood pressure
  14. Function: (heart) vena cava
    Superior Vena Cava - return blood back to the Right Atrium from the upper part of the body.

    Inferior Vena Cava - carrying the blood back to the Right Atrium from the lower part of the body
  15. In summary about the right part of the heart
    • Carries deoxygenated blood
    • Consists of Pulmonary arteries, tricuspid valves, vena cava, right ventricle and atria
  16. Function: (Heart) Semi lunar valves
    • Prevents backflow of blood(blood is moving towards pulmonary artery and aorta)
    • It opens because of blood pressure
  17. In summary about valves
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    • ventricles contract, valves closes.
    • present in veins
  18. Function: (heart) median septum
    To prevent oxygenated and deoxygenated blood from diffusing and mixing
  19. Blood vessels
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  20. Arteries
    • Carries oxygenated blood away from the heart to all parts of the body (except for pulmonary arteries which sends deoxygenated blood to the lungs)
    • has thick muscular walls because it has to withstand high blood pressure (especially for aorta because it is near the heart)
    • small lumen
  21. Veins
    • Carries deoxygenated blood towards the heart from all parts of body (except for pulmonary vein which sends oxygenated blood from lungs to heart)
    • has thin muscular walls because it resist the lowest blood pressure thus, needing valves to prevent backflow
  22. Capillaries
    • carries oxygenated blood from arteries to cells
    • carries deoxygenated blood from cells to veins
    • has one cell thick wall (endothelium) thus, fluid, platelets or white blood cells, substances can pass through the cells. Because of the one cell thick wall, it allows efficient exchange of materials.
  23. What is in the blood?
    • red blood cells
    • white blood cells - lymphocyte and phagocyte
    • platelets
    • plasma
  24. Function: (Blood) Red Blood cell
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    • To transport oxygen from the lungs to the rest of the tissue cells
    • circular and biconcave
    • contains a red pigment, haemoglobin which binds to 4 oxygen molecule and will release oxygen when passes the cells.
    • absence of nucleus so more haemoglobin can be in the red blood cell which will allow efficient transport

    • Sickle cell
    • contains less oxygen because of the deformed shape(sickle).
    • Patients die because oxygen transportation is not efficient.
  25. Function: (Blood) White Blood Cell
    • Lymphocyte
    • produces antibodies

    • Phagocytes
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    • has a lobed nucleus
    • carry out phagocytosis which engulfs and ingest foreign particles
  26. Function: (Blood) Platelets
    makes blood clot whenever there is a wound
  27. Function: (Blood) Plama
    • transport food substance such as glucose from the gut to the body
    • transport waste product from the cells to rectum
    • 90% water
    • transports water, nutrients, bicarbonate ions and hormones
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bio terms (transport in man)
bio terms