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White Blood Cells

White Blood Cells

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Description:

This lesson will describe how white blood cells play a role in defending our body's defense.

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Tutorial

What's Covered

This lesson is going to look at the different types of white blood cells by examining:

  1. Granulocytes
  2. Agranulocytes

1. Granulocytes

Leukocyte is another word for white blood cells and white blood cells are a component of blood that play a role in the body's defense system. They clean up the body, remove old cells, destroy bacteria, fight infection, et cetera. There are five different types of white blood cells broken into two categories.

Terms to Know

    • Leukocytes
    • Also called white blood cells, leukocytes are the immune system/defense cells of the body. There are five major types of leukocytes in the body: neutrophils, eosinophils, basophils, monocytes, lymphocytes.
    • White Blood Cells
    • Also called leukocytes, white blood cells are the immune system/defense cells of the body. There are five major types of white blood cells in the body: neutrophils, eosinophils, basophils, monocytes, lymphocytes.

Granulocytes are types of white blood cells that have granules in their cytoplasm that are visible when stained. The granules are a type of enzyme and plays a role in defense.

Term to Know

    • Granulocytes
    • A term used to classify white blood cells by their visible granules in their cytoplasm.

The three different types of granulocytes are:

  • Basophils- also called mast cells, play a role in the inflammation response. When their granules are released from the cell, it contributes to inflammation. Inflammation is one way the body helps defend itself against certain types of pathogens.
  • Eosinophils-type of granulocyte that target parasites too big for phagocytosis

ExampleIf somebody has worms, eosinophils are the type of white blood cell that would target those and help to get rid of it.

  • Neutrophils- a type whose main role is in targeting bacteria and fungi.

Terms to Know

    • Neutrophils
    • Also called first responder cells, neutrophils attack bacteria invaders that enter the body. Neutrophils are distinguished by their 3-5 lobed thin, horseshoe shaped nucleus.
    • Eosinophils
    • Eosinophils attack parasites that enter the body (example: worms) and are distinguished by their bi-lobed nucleus.
    • Basophils
    • Basophils store the chemicals heparin and histamine and are used to promote inflammation (example: allergies). Basophils are distinguished by their s-shaped nucleus and large granules.

2.Agranulocytes

Agranulocytes do not have those visible granules in their cytoplasm. There are two types:

  • Lymphocytes-This group of white blood cells plays a role in immune system responses. This group can be broken down further, but you will look at the subgroups of lymphocytes when you examine the immune system in a later lesson.
  • Monocytes-this type will develop into macrophages and then engulf microbes.

Terms to Know

    • Lymphocytes
    • There are two types of lymphocytes, T & B cells; lymphocytes are responsible for carrying out specific immune responses and primarily attack cells (cancers, virally infected cells).
    • Monocytes
    • Monocytes are circulating phagocytes that are more than likely on their way to migrating into tissues throughout the body. Monocytes adapt to their tissue environments and look different than in the circulating blood once they migrate into tissues. Monocytes are classified by their large, horseshoe shaped nucleus.

Summary

White blood cells are also called leukocytes. There are five different types broken into two categories. Granulocytes have visible granules in their cytoplast. They include basophils, which play a role in inflammation, eosinophils, which target large parasites, and neutrophils, which target bacteria and fungi. Agranulocytes have no visible granules and include lymphocytes which carry out immune responses, and monocytes, which develop into macrophages and engulf microbes.

Keep up the learning and have a great day!

Source: Source: THIS WORK IS ADAPTED FROM SOPHIA AUTHOR AMANDA SODERLIND

TERMS TO KNOW
  • Leukocytes

    Are also called white blood cells, leukocytes are the immune system/defense cells of the body. There are five major types of leukocytes in the body: neutrophils, eosinophils, basophils, monocytes, lymphocytes.

  • White Blood Cells

    Are also called leukocytes, white blood cells are the immune system/defense cells of the body. There are five major types of white blood cells in the body: neutrophils, eosinophils, basophils, monocytes, lymphocytes.

  • Granulocytes

    A term used to classify white blood cells by their visible granules in their cytoplasm.

  • Neutorphils

    Also called first responder cells, neutrophils attack bacteria invaders that enter the body. Neutrophils are distinguished by their 3-5 lobed thin, horseshoe shaped nucleus.

  • Eosinophils

    Eosinophils attack parasites that enter the body (example: worms) and are distinguished by their bi-lobed nucleus.

  • Basophils

    Basophils store the chemicals heparin and histamine and are used to promote inflammation (example: allergies). Basophils are distinguished by their s-shaped nucleus and large granules.

  • Lymphocytes

    There are two types of lymphocytes, T & B cells; lymphocytes are responsible for carrying out specific immune responses and primarily attack cells (cancers, virally infected cells).

  • Monocytes

    Monocytes are circulating phagocytes that are more than likely on their way to migrating into tissues throughout the body. Monocytes adapt to their tissue environments and look different than in the circulating blood once they migrate into tissues. Monocytes are classified by their large, horseshoe shaped nucleus.