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There are several forms of this kind of blood cell. Each of them aids in the fight against disease in the body. What type of blood cell is this?

Answer 1

Leucocytes or White Blood Cells.

Leucocytes consist of neutrophils, basophils, eosinophils, lymphocytes, macrophages, and monocytes, all of which have distinct functions within the immune system of the body.

Neutrophils, monocytes, and macrophages are typically the immune system's cleanup crew, whereas lymphocytes—more especially, the T [from thymus] lymphocytes—are the ones that initiate the immune response.

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Answer 2

Austin Alexander

These are white blood cells, also known as leukocytes.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.