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प्रश्न
Differentiate between:
Red blood cells and White blood cells
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उत्तर
| Red blood cells | White blood cells. |
| These are minute biconcave disc like structures, flat in centre, thick and round at the periphery and nuclei are absent in mature RBCs. | These collect blood from different organs of the body. |
| These contain a respiratory pigment haemoglobin. | Haemoglobin is not present. |
| RBCs help in the transport of oxygen and CO2. | WBCs help in the protection of the body against infections from the germs. |
| The number of RBCs in an adult male is 5 million per cu. millimeter. | Their number is usually about 4000-8000 per cubic millimeter. |
| Their average life span is about 120 days. | Their average life span is about two weeks. |
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संबंधित प्रश्न
The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the questions which follow:
(i) Name the blood vessels labelled 1 and 2.
(ii) State the function of blood vessels labelled 5 and 8.
(iii) What is the importance of the blood vessel labelled 6?
(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(v) Draw a diagram of the different blood cells as seen in a smear of human blood.
State the functions of blood in our body.
Why is it necessary to know the blood groups before giving transfusion?
MULTIPLE CHOICE TYPE:
(Select the most appropriate option)
The valve present between the right atrium and the right ventricle is the
(a) tricuspid valve
(b) bicuspid valve
(c) semi-lunar valve
(d) mitral valve
Explain the difference.
Arteries and veins.
Fill in the blank:
______ carry pure blood.
The table below is designed to indicate the transport of certain substances in our body. Fill in the blanks with suitable answers.
| Substance | From | To | |
| 1. | ______ | Lungs | Whole Body |
| 2. | Carbon Dioxide | ______ | ______ |
| 3. | Urea | ______ | ______ |
| 4. | Digested Carbohydrates | Intestines | ______ |
| 5. | ______ | ______ | Target Organs |
| 6. | Heat | ______ | Whole Body |
Which component of the haemoglobin molecule combines with the oxygen molecule to form oxyhaemoglobin?
Name the following:
The structure that holds the heart valves in position.
What are the normal values of blood pressure in a normal human adult?
