Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

What are the roles of leukocytes and platelets?

Summary Introduction

To review:

The role of leucocytes and platelets.


The blood inside the body carries several cells that are responsible for carrying oxygen throughout the body, fighting against infections, and clotting blood if any blood vessel is ruptured. There are different type of blood cells, namely, erythrocytes, leucocytes, and thrombocytes (platelets).


The white blood cells (WBCs) also known as leucocytes are responsible for providing immunity and fighting against infections. The leucocytes are present in bone marrow and they arise from lymphoid stem cells. Stem cells are uniform cells that turn into specialized cells when the body requires them. The leucocytes are of following types:

1. Neutrophils: Most white blood cells are neutrophils that leads to immune system response. These are the most abundant cells present among all the leucocytes. The neutrophils, when mature, have a segmented nucleus.

2. Lymphocytes: There is only a single nucleus present in lymphocytes. Lymphocytes are considered to be an important part of leucocytes because they become memory cells. Many leucocytes form antibodies when the body is exposed to any kind of infection. Lymphocytes remember these infections and kill these infectious agents when they enter the body again.

3. Eosinophil: The nucleus in eosinophils is segmented. They play an important role in controlling the allergic reactions taking place in the body...

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