Test your knowledge about the specific functions of the five types of white blood cells
1. release histamine, which promotes inflammation.
2. the cytoplasm is a thin ring around the nucleus.3. contain cytoplasmic granules that stain bright red with eosin.4. the most common type of white blood cells. 5. two- to four-lobed nuclei.
6. enlarge and become macrophages which engulf foreign substances. 7. contain large cytoplasmic granules that stain dark blue or purple with basic dyes.

1. Release histamine, which promotes inflammation- basophils.

2. The cytoplasm is a thin ring around the nucleus- lymphocytes.

3. Contain cytoplasmic granules that stain bright red with eosin- eosinophils.

4. The most common type of white blood cells- neutrophils.

5. Two- to four-lobed nuclei- neutrophils.

6. Enlarge and become macrophages which engulf foreign substances-  monocytes.

7. Contain large cytoplasmic granules that stain dark blue or purple with basic dyes- basophils.

Explanation:

White blood cells or WBC are the cells which provide the defence against pathogens so they are also known as the soldiers of the body. Five types of WBC are present in the body namely - neutrophils, eosinophils, monocytes, basophils and lymphocytes.

1. Neutrophils- They are the most abundant WBC in the blood in about 40% to 60%. These neutrophils are distinguished on the basis of lobes which are usually present in two to five.

2. Eosinophils- the cells which account for  1% to 4% of total WBC characterized by red-stained cytoplasmic granules and a bilobed nucleus.

3. Basophils- The cells characterized by a large blue -stained cytoplasmic granules. they act by producing heparin nd histamine in allergic reactions.

4. Lymphocytes- they are the smallest of all the WBC easily characterized by a spherical nucleus with very little cytoplasm.

5. Monocytes- the largest of all WBC with a  kidney-shaped nucleus and abundant cytoplasm. They act by becoming macrophages and engulfing the pathogens and foreign material by a process called phagocytosis.

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