A cellular component of the innate defenses includes natural killer cells
A cell is the simplest, basic and functional units of all living organisms.
There are two types of living organisms based on the numbers of cells they have. These are:
Unicellular organisms are those organisms consisting of just one cell. That is, they are single-celled organisms. An example is bacteria
Multicellular organisms are organisms made up of two or more cells. Examples include lizard, roundworms, crabs, man.
So therefore, a cellular component of the innate defenses includes natural killer cells
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