The heart

Cards (31)

  • pulmonary = lungs
  • vein = in
  • Artery = away
  • tricuspid valve = right
  • bicuspid valve = left
  • valves prevent backflow of blood
  • pulmonary artery takes blood to the lungs --> to get more oxygen
  • pulmonary vein = only vein with oxygenated blood (back from lungs)
  • pulmonary artery = only artery to carry deoxygenated blood
  • aorta = extremely high pressure
  • no valves = blood pressure so high backflow cannot happen
  • left side = thicker muscles --> to pump blood further around body + at higher pressure
  • right side = thinner muscles --> only has to pump blood to lungs (close) + not so high pressure
  • vena cava = vein
  • atria = plural for atrium
  • Vena cava -> right atrium -> right ventricle -> pulmonary artery -> lungs -> pulmonary vein -> left atrium -> left ventricle -> aorta -> around body organs -> back to vena cava
  • blood becomes deoxygenated due to respiring organs (O2 = aerobic respiration = ATP)
  • systematic circuit = whole body
  • pulmonary circuit = lungs
  • Atria & Ventricles contract -> high pressure -> open/close valves
  • blood gets reoxygenated from the oxygen in the alveoli in the lungs
  • muscle contracts = increasing pressure
  • heart = muscle
  • double circulatory system = blood passes through heart twice in one cycle
  • REASON FOR DOUBLE CIRC SYS = blood enters lungs: decreased blood pressure for diffusion in alveoli -not enough pressure to travel through whole body -> back to heart so pressure can increase
  • systematic circuit = higher pressure ( left = thicker walls can pump b further)
  • Aorta -> coronary arteries : provide heart muscle with oxygenated blood = can carry out resp + produce ATP to contract
  • label this heart:
    A) vena cava
    B) pulmonary vein
    C) pulmonary artery
    D) aorta
    E) left ventricle
    F) left atrium
    G) right atrium
    H) right ventricle
    I) tricuspid valve
    J) bicuspid valve
    K) semi-lunar valves
    L) right
    M) left
  • why does the left ventricle have a thicker muscle wall than the right ventricle?
    to pump blood further around the body at a higher pressure
  • why is the right ventricle's muscle wall thinner?
    it transports blood to lungs, which is a shorter distance than what the left ventricle transports blood to - the entire body - so needs less pressure
  • why is the blood pumped in the systematc circuit at a higher pressure than the pulmonary circuit?

    the thicker muscle walls of the left ventricle allow blood to be pumped at a further distance and higher pressure