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प्रश्न
Describe the functions of the: Blood
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उत्तर
Blood circulates throughout the body and performs the following functions
- It carries or transports food and oxygen to each body cell.
- It carries away waste products to organs (like kidneys, lungs and intestine) from where they are excreted out of the body.
- It protects the body against infection by destroying germs.
- It helps in blood clotting, thereby preventing excessive blood loss.
- It regulates body temperature
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संबंधित प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow :
(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
Give appropriate biological or technical terms for the following
The relaxation phase of the heart.
Match the statements in Column A with those in Column B:
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
Is it true that your heart beats more than one lac times per day?
What is Endothelium?
Name the organ from which oxygenated blood goes into the heart
Complete the following sentence with appropriate word:
The foundations of physiology were laid by the physician __________.
Given below are four statements regarding human blood circulatory system:-
- Arteries are thick walled and have narrow lumen as compared to veins.
- Angina is acute chest pain when the blood circulation to the brain is reduced.
- Persons with blood group AB can donate blood to any person with any blood group under ABO system.
- Calcium ions play a very important role in blood clotting.
Which two of the above statements are correct?
Name these:
Two kinds of circulatory systems in different animals.
