Inclusion

Inclusion is a term used in the field of medicine and biology to refer to any material that is trapped inside a cell or organism. Inclusions can be naturally occurring substances, such as pigments, or they can be foreign materials, such as bacteria or viruses. Inclusions can also refer to abnormal accumulations of substances in cells, such as in the case of certain diseases.

Types of Inclusions

There are several types of inclusions that can be found in cells. These include:

• Lipofuscin - This is a type of pigment that accumulates in the cells of aging organisms. It is often referred to as "age pigment".

• Hemosiderin - This is a type of iron-storage complex that can be found in certain types of cells. It is often seen in conditions where there is an excess of iron in the body.

• Glycogen - This is a type of carbohydrate that is stored in the cells. It can be seen in certain diseases where there is an abnormal accumulation of glycogen, such as in Glycogen storage disease.

• Pathogenic bacteria and viruses - These are types of microorganisms that can invade cells and cause disease. They can often be seen inside cells when viewed under a microscope.

Clinical Significance

The presence of inclusions in cells can often provide important clues about the health of an organism. For example, the presence of lipofuscin can indicate aging, while the presence of hemosiderin can indicate an excess of iron. Similarly, the presence of bacteria or viruses can indicate an infection.

In some cases, the presence of inclusions can also indicate a specific disease. For example, the presence of abnormal accumulations of glycogen can indicate a glycogen storage disease.

See Also

• Cell (biology)
• Microbiology
• Pathology

Inclusion Resources
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