MCQ Detailed View

In the human body, blood is made up of different types of cells, each with a special function. Among these, the White Blood Cells (WBCs) are known as the “soldiers of the body.” This is because they play the most important role in defending the body against harmful microorganisms like bacteria, viruses, fungi, and parasites.

White Blood Cells are part of the immune system. Unlike Red Blood Cells (RBCs), which carry oxygen, and platelets, which help in blood clotting, WBCs are specialized for protection. They constantly move through the bloodstream and tissues, always ready to detect and destroy invaders that can cause infections or diseases.

There are different types of White Blood Cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils. Each type has a unique role:

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  Neutrophils are the first responders to infections and directly kill bacteria.

  
  


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  Lymphocytes (B-cells and T-cells) are responsible for producing antibodies and remembering past infections for faster defense in the future.

  
  


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  Monocytes become macrophages, which “eat up” dead cells and microbes.

  
  


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  Eosinophils and basophils help fight parasites and are involved in allergic reactions.

  
  

This strong defense system makes WBCs essential for survival. When the number of WBCs is low, the body becomes more vulnerable to infections. On the other hand, when they detect harmful agents, they multiply rapidly and attack the threat, just like soldiers protecting a nation from enemies.

In summary, White Blood Cells are rightly called the soldiers of the body because they guard, defend, and protect the body against diseases, keeping us healthy and safe.