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प्रश्न
The cells in our blood which destroy disease-causing germs are:
विकल्प
Platelets
Skin cells
RBCs
WBCs
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उत्तर
WBCs
White blood cells or WBCs destroy the disease-causing germs. They are like soldiers that protect the body from various infections.
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संबंधित प्रश्न
Mention the exact location of the Pulmonary semilunar valve
State the functions of blood in our body.
What is meant by human circulatory system? Name the organs of the circulatory system in humans.
The nearest organ to which the heart supplies oxygenated blood is:
Is it true that your heart beats more than one lac times per day?
Given below is a certain structure, write its chief functional activity.
Erythrocytes - ______.
The valve which prevents back flow of blood in the veins and lymph vessels ______.
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
artery and vein (type of blood primarily flowing through)
What is diastole?
Give reason for the following:
The blood groups of both the donor and recipient must be known before transfusing blood.
Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs :
Column A Column B
(i) Cranial nerves Testosterone
(ii) Leydig cells Natural reflex
(iii) Acetylcholine 12 pairs
(iv) Spinal nerves Prolactin
(v) Sneezing Neurotransmitter
- 18 pairs
- 31 pairs
- Conditioned reflex
What is haemoglobin? State the consequences of deficiency of haemoglobin in our bodies.
Give any three differences between an artery and a vein
Define the Circulatory system.
Define the Veins.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
In what ways does the blood entering the kidney differ from that leaving the kidney?
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 |
Blood is produced in the bone marrow.
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?
