STRUCTURE AND WORKING OF HUMAN HEART

Heart is a muscular organ which pumps blood to all parts of the body.

 

STRUCTURE OF HEART

  • Our heart has four chambers. Upper two chambers  are called atria and  the lower two chambers are called ventricles.
  • Since Ventricles pump blood to different organs under high pressure. Therefore , their walls are thicker than atria.
  • The right and left chambers are separated by Septum. It prevent the mixing of oxygenated(pure) and deoxygenated(impure) blood.
  • The atria and ventricles have valves between them to prevent backward flow  of blood.

WORKING OF HUMAN HEART

The working  of heart can be explained in the following  steps.

  1. When all the four chambers are relaxed, the pulmonary vein brings blood from lungs to left  atrium of the heart.
  2. When the left atrium contract, the oxygenated blood pushes into the left ventricle.
  3. When the left ventricle contract, the oxygenated blood pushes from left ventricle to all body organs through main artery.
  4. Now the main vein carry deoxygenated blood from all body organs to the right atrium of the heart.
  5. When right atrium contract, the blood pushes from right atrium to right ventricle.
  6. When right ventricle contract, the deoxygenated blood move from right ventricle to the lungs through pulmonary artery.

In this way blood twice through the heart in on circulation, therefore it is known as double circulation.

 

PLEASE GIVE YOUR VALUABLE REVIEW IN COMMENT BOX

Questions for Self eveluation.....

  1. In how many chamber our heart is divided?
  2. what the other two chambers are called?
  3. what the lower two chamber called?
  4. What is the special name given to the artery which carry deoxigeneted blood.
  5. What is the function of septum.
  6.  What do you understand by double circulation.

HAVE A GOOD DAY.......

atriaatriumfunctioning of human heartseptumStructure of human heartwhat are atrium and ventricalsworking of human heart
By LIFE PROCESSES11 Comments on STRUCTURE AND WORKING OF HUMAN HEART

11 Replies to “STRUCTURE AND WORKING OF HUMAN HEART”

  1. 1) four
    2) atria
    3) ventricels
    4) pulmonary artery
    5) septum prevents mixing of oxygenated & deoxyegenated blood
    6) Double circulation is a process during which the blood passes two times the heart in one cycle.

  2. Ans-1) four
    Ans-2) atria
    Ans-3) ventricels
    Ans-4) pulmonary artery
    Ans-5) septum prevents mixing of oxygenated & deoxyegenated blood
    Ans-6) Double circulation is a process during which the blood passes two times the heart in one cycle.

  3. 1. Four
    2. Atria
    3. Ventricles
    4. Pulmonary artery
    5. Septum prevents mixing of oxygenated and deoxygenated blood.
    6. Double circulation is a process during which the blood passes two times the heart in one cycle.

  4. 1-)four
    2-)atria
    3-)ventricles
    4-)pulmonary artery
    5-)it prevents the mixing of oxygenated and deoxygenated blood
    6-)double circulation is a process during which the blood passes two times the heart in one cycle

  5. 1. Four
    2. Atria, ventricle
    3. Ventricle
    4. Vein
    5. The right and left chamber saperated by septum
    6. In this way blood twice through the heart in on circulation is called double circulation

  6. 1.) Four
    2.) Ventricle, Artium
    3.) Left ventricle and Right
    ventricle
    4.) Vena cave
    5.) Seperates left and Right
    chambers of heart
    6.) When blood passes twice
    through the heart then it
    is
    called double circulation

  7. 1). Four
    2).atria
    3).ventricles
    4). pulmonary artery
    5). septum prevents mixing of oxygenated & deoxygenated blood
    6). Double circulation is a process during which the blood passes two times the heart in one cycle

  8. 1) four
    2) atria
    3) ventricels
    4) pulmonary artery
    5) septum prevents mixing of oxygenated & deoxyegenated blood
    6) Double circulation is a process during which the blood passes two times the heart in one cycle.

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