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प्रश्न
What is the function of spleen?
Write important role/roles of the following:
Spleen
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उत्तर
- The spleen is a large lymphatic organ.
- The spleen acts as a blood reservoir in case of
emergency such as haemorrhage, stress, or poisoning. - It produces lymphocytes.
- It destroys worn-out red blood cells (RBCs).
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संबंधित प्रश्न
Why is blood needed by all the parts of a body?
State the functions of blood in our body.
Is it true that your heart beats more than one lac times per day?
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 |
Describe the functions of the: Blood vessels
Draw the structure of human heart and label its parts
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 |
Short answer question.
Write a note on blood plasma.
Respiration takes place because of its up and down movement.
Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:
 |
- Label the parts 1 and 4 indicated in the diagram.
- Which of the above mentioned number is the thickest artery? Also write its name.
- Mention the number and chamber of the heart which has the thickest muscular wall.
- Which of the above numbers/structures has the maximum number of blood capillaries?
- Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.
