Q. 524.7( 7 Votes )

Describe the working of human blood circulatory system with the help of a suitable diagram which shows all the steps involved.

Answer :

Following steps are included in the functioning of human circulatory system:

(i) The pulmonary vein brings the oxygenated blood from the lungs in the left atrium of the heart.

(ii) Left atrium contracts and pumps blood into the left ventricle through valve.

(iii) When the left ventricle contracts, the oxygenated blood enters the main artery called aorta. The blood travels from the main artery to larger and smaller arteries into the capillary network.

(iv) The aorta transports the blood to all the organs of the body except the lungs. The oxygenated blood releases oxygen, nutrients and other substances and takes on carbon dioxide and waste substances. The deoxygenated blood enters the vena cava which carry it to the right atrium of the heart.

(v) Right atrium pumps deoxygenated blood into the right ventricle through the valve.

(vi) When the right ventricle contracts, the deoxygenated blood enters the lungs through pulmonary artery and releases carbon dioxide and absorbs fresh oxygen from air. The blood becomes oxygenated again and is sent to the left atrium of heart by pulmonary vein for circulation in the body. This whole process is repeated continuously.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Get to Know How Do We Respire?42 mins
Get to Know About Waste EliminationFREE Class
Genius Quiz | The Vital Processes38 mins
Quiz | Let's Recall - Life Process50 mins
Know More About Transport in animals47 mins
Defining Life and Life Processes57 mins
Doubt Session - Life Processes46 mins
Origin of LIFE40 mins
From single cell to baby45 mins
Champ Quiz | Dental Caries31 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses