Структура и заболевания сердца - реферат по медицине, физкультуре и здравоохранению



  • 12 ounces, beats 70 to 80 times a minute, and is enclosed by a sturdy membrane called pericardium.
  • The four chambers of the heart have special roles in the pumping process.
  • The upper chambers are called the auricles; the lower chambers, the ventricles.
  • Between the right auricle and right ventricle is a valve, called the tricuspid valve.
  • The valve action on both sides is also co-ordinated with the two phases of the pumping action.
  • The weak walls of both auricles contract to press the blood into the relaxed ventricles.
  • The mitral valve, between the left auricle and ventricle, has two cusps or leaflets.
  • The tricuspid valve, between the right auricle and ventricle, has three cusps.
  • Both valves function in the same manner.
  • There is also a distinction between a heart attack, heart disease, and "heart failure".



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