Question

Define cell inclusion.

Answer 1

Hint: They are tiny particles and the non-living materials in the cell protoplasm. They do not have activity like other organelles. They are normally reserve materials of some variety.

Complete answer: Cell inclusions are considered various nutrients or pigments which will be found within the cell, but don't have activity like other organelles.
Cell inclusions are tiny particles found freely put up and floating within the cytoplasmic matrix. These cell inclusions are formed with decreasing pH and from the pool of soluble fusion proteins within the cell. They are the elementary bodies, formed during infectious diseases or within the virus-infected cells like rabies, herpes, measles, etc.
Examples of cell inclusions are:
Glycogen: Glycogen is the commonest sort of glucose in animals and is particularly abundant in cells of muscles, and liver.
Lipids: Lipids are triglycerides in storage form is that the common sort of inclusions, not only are stored in specialized cells (adipocytes) but are also located as individuals droplets in various cell type especially hepatocytes.
Crystals: Crystalline inclusions have long been recognized as normal constituents of certain cell types like Sertoli cells and Leydig cells of the human testis, and infrequently in macrophages.
Pigments: the foremost common pigment within the body, besides hemoglobin of red blood cells is melanin, manufactured by melanocytes of the skin and hair, pigments cells of the retina and specialized nerve cells within the substantia nigra of the brain.

Note: Cell inclusions referred to as cytoplasmic inclusions. These structures were first observed by O. F. Müller in 1786. The main difference between cell organelles and cell inclusions is that the cell organelles are membrane-bound compartments that perform a specific function within the cell whereas the cell inclusions are non-living materials in the cytoplasm.