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प्रश्न
Write a short note on the human heart.
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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
Match the statements in Column A with those in Column B:
Is it true that your heart beats more than one lac times per day?
Give reason for the following:
The arteries are deep seated in the body
Fill in the blanks with suitable words given below:
The carbon dioxide loaded blood from right ventricle is pumped into the lungs through ______.
True or false:
The four blood groups in human beings are A, B, AB and AO
True or false:
Blood group A has antigen A.
Match the statements in Column A with those in Column B
| Column A | Column B | ||
| 1 | Heart | a | Movement of materials |
| 2 | Food and oxygen | b | Channels for transport in man |
| 3 | Carrier of oxygen | c | A living pump |
| 4 | Circulation | d | Materials needed by every living being |
| 5 | Arteries and veins | e | Red blood cells |
The endocrine glands produce chemical substances called ____
______ WBCs are present per mm3 of blood.
Mention the phase of heart beat in which both the atrio-ventricular valves are closed.
