Blood Pressure: Systolic Pressure And Diastolic Pressure | Class 11 Biology

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  • čas přidán 17. 05. 2021
  • Blood Pressure: Systolic Pressure And Diastolic Pressure | Class 11 Biology
    About This Video ........................
    In This Video Lecture You Will Learn Basic Concept Of Blood Pressure
    1. Relaxation phase - diastole.
    atria are filled with blood, they become distended and have more pressure than the ventricles. This
    The deoxygenated blood enters right atrium through vena cava, and oxygenated blood enters left
    ventricles which are relaxed.
    this is called atrial systole. The blood passes through tricuspid and bicuspid valves, into the two
    The muscles of atria simultaneously contract, when the atria are filled and distended with blood,
    is pumped to pulmonary arteries and aorta. The tricuspid and bicuspid valves close, and ‘lubb’
    dubb can be heard with the help of a stethoscope).
    relaxed period of heart chambers is called diastole.
    3. Ventricles contract - ventricular systole
    at the base of pulmonary artery and aorta close simultaneously, and ‘dubb’ sound is made. (Lubb,
    2. Atria Contract - atrial systole
    atrium through pulmonary veins. The walls of the atria and that of ventricles are relaxed. As the
    When the ventricles receive blood from atria, both ventricles contract simultaneously and the blood
    sound is made. Ventricular systole ends, and ventricles relax at the same time semilunar valves
    One complete heart beat consists of one systole and one diastole, and lasts for about 0.8 seconds.
    In one’s life, heart contracts about 2.5 billion times, without stopping.
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