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प्रश्न
Differentiate between:
Red blood cells (RBC) and White blood cells (WBC)
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उत्तर
| Red blood cells (RBC) | White blood cells (WBC) |
| 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
Given below is a diagram of a human blood smear. Study the diagram and answer the questions that follow:
- Name the components numbered ‘1’ to ‘4’.
- Mention two structural differences between the parts ‘1’ and ‘2’.
- Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
- What is the average lifespan of the component numbered ‘1’ ?
- Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain.
what is Venule?
Give reason for the following:
The walls of the left ventricle are thicker than the walls of all other chambers.
Give reason for the following:
Only the veins and not the arteries are provided with valves.
Put a tick mark (✓) against the correct alternative in the following statement.
Pulmonary vein carries
Fill in the blanks with suitable words given below:
The liquid part of coagulated blood is known as ______.
True or false:
Blood group A has antigen A.
Name the Following
Oxygen is transported by the blood in the form of
Complete the following sentence with appropriate word:
Beside food, oxygen and waste materials, circulatory system transports ________ to various parts of the body.
______ is an agranulocyte.
