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प्रश्न
Write a short note on the human heart.
उत्तर
The heart is a pump that circulates blood to all parts of the body. It is about the size of a human fist and located to the left in chest cavity. It has four chambers – two upper chambers called auricles or atria and two lower chambers called ventricles. The auricles receive blood from different body parts and ventricles pump the blood out of the heart. The valves between auricle and ventricle on each side allow blood to flow in one direction only. Heart acts as a double pump. The right side of the heart carries deoxygenated blood to the lungs to be oxygenated. The left side of the heart pump oxygenated blood to the body.
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संबंधित प्रश्न
Describe, in brief, the circulatory system in human beings.
What does the term “double circulation” mean?
Give reason for the following:
The walls of the left ventricle are thicker than the walls of all other chambers.
Fill in the blanks with suitable words given below:
The two lower chambers of the heart are called ______.
In which organ of our body does blood get oxygenated?
The artificial method of filtering the blood or removing the wastes from the blood.
Analogy
Lungs: Respiratory system:: _______: Circulatory system.
Which of the following cells are produced from reticulocytes?
Name the following :-
The cell organelle where photosynthesis occurs
Name the following:
The structure that holds the heart valves in position.
