Human circulatory system

Human circulatory system also called as cardiovascular system. The major function of circulatory system is to circulate or transport the blood and nutrients throughout the body. There are 3 parts of circulatory system such as blood, heart and blood vessels. As in the earlier topic we came to know about blood and components of blood. So now let’s discuss about the second part that is heart.

Anatomy of Heart :

  1. The human heart is made up of 4 chambers in which two are called as auricles or atrium and the other two called as ventricles. The left part of heart contains left atrium and left ventricle whereas right part of heart contains right atrium and right ventricle.
  2. The valve present in between right atrium and right ventricle is called tricuspid valve. Those the valve present between left atrium and left ventricle called bicuspid valve.

Circulation of blood :

  1. The circulatory system in humans have 2 types of circulation. Namely,
  2. Pulmonary circulation
  3. Systemic circulation
  4. Pulmonary circulation of blood is transport from heart to lungs and then lungs to heart.
  5. Systemic circulation of blood circulated from heart to other parts of the body.
  6. Deoxygenated blood enters the heart through superior vena cava and it will enter into the right atrium or right auricle.
  7. The blood in the right atrium will enter into right ventricle, through the valve present in between them is tricuspid valve.
  8. From the right atrium 70 % of the blood will enter into right ventricle.
  9. Through the right ventricle deoxygenated blood will enter into pulmonary artery as we can see in the above diagram.
  10. The blood enters into pulmonary artery, now will transport into lungs. This process is called as pulmonary circulation.
  11. From the lungs the oxygenated blood through the pulmonary veins will enter into left atrium.
  12. The valve present in between left atrium and left ventricle is called bicuspid valve.
  13. Through the bicuspid valve the oxygenated blood will enter into left ventricle.
  14. The oxygenated blood present in left ventricle will enter into aorta and through this aorta oxygenated blood will be transported to all the parts of the body. This is called systemic circulation.

Question and answers :

1.) How many chambers are present inhuman heart and the name them.

Answer : The human heart is made up of 4 chambers in which two are called as auricles or atrium and the other two called as ventricles. The left part of heart contains left atrium and left ventricle whereas right part of heart contains right atrium and right ventricle.

2.) Where is bicuspid valve present in heart ?

Answer : the valve present between left atrium and left ventricle called bicuspid valve.

3.) Where is bicuspid valve present in heart ?

Answer : The valve present in between right atrium and right ventricle is called tricuspid valve.

4.) Which 2 types of circulation present in heart ?

Answer : The circulatory system in humans have 2 types of circulation. Namely,

  1. Pulmonary circulation
  2. Systemic circulation

5.) What is systemic circulation ?

Answer : Systemic circulation of blood circulated from heart to other parts of the body.

6.) What is pulmonary circulation ?

Answer :Pulmonary circulation of blood is transport from heart to lungs and then lungs to heart.

7.) Explain anatomy of heart.

Answer : The human heart is made up of 4 chambers in which two are called as auricles or atrium and the other two called as ventricles. The left part of heart contains left atrium and left ventricle whereas right part of heart contains right atrium and right ventricle. The valve present in between right atrium and right ventricle is called tricuspid valve. Those the valve present between left atrium and left ventricle called bicuspid valve.

8.) Explain the steps of circulation in heart.

Answer :

  1. The circulatory system in humans have 2 types of circulation. Namely,
  2. Pulmonary circulation
  3. Systemic circulation
  4. Pulmonary circulation of blood is transport from heart to lungs and then lungs to heart.
  5. Systemic circulation of blood circulated from heart to other parts of the body.
  6. Deoxygenated blood enters the heart through superior vena cava and it will enter into the right atrium or right auricle.
  7. The blood in the right atrium will enter into right ventricle, through the valve present in between them is tricuspid valve.
  8. From the right atrium 70 % of the blood will enter into right ventricle.
  9. Through the right ventricle deoxygenated blood will enter into pulmonary artery as we can see in the above diagram.
  10. The blood enters into pulmonary artery, now will transport into lungs. This process is called as pulmonary circulation.
  11. From the lungs the oxygenated blood through the pulmonary veins will enter into left atrium.
  12. The valve present in between left atrium and left ventricle is called bicuspid valve.
  13. Through the bicuspid valve the oxygenated blood will enter into left ventricle.
  14. The oxygenated blood present in left ventricle will enter into aorta and through this aorta oxygenated blood will be transported to all the parts of the body. This is called systemic circulation.

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