How many different kinds of cells are there in the human body?

Many. As the cells descend from the fertilized zygote there are changes to which genes are even able to be expressed by altered proportions of transcription factors along with methylation of selected chromosomal regions. The distinction into 'types' is fairly arbitrary. Two cells of the same 'type' can be quite different in patterns of expressed genes.

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RE:

How many different kinds of cells are there in the human body?

I just want to see some opinions.

Broadly divided, there are four types of cells:

Epithelial cells

Connective cells

Muscle cells

Nerve cells

If you want all the cells, here you go:

Squamous epithelial cells

Cuboidal epithelial cells

Columnar epithelial cells

Glandular epithelial cells

Red Blood Cells

White Blood Cells

Lymph

Bone cells

Tendon

Cartilage

Striated muscle cells (Voluntary muscle)

Non - striated muscle cells (Involuntary muscle)

Cardiac muscle cells (Heart muscle)

Neuron (Nerve cell)

There are about 210 distinct human cell types.

Below is the Website that will give you the names of them:

http://en.wikipedia.org/wiki/List_of_distinct_cell...

I hope this helps...

there are approximately 100,000,000,000,000 cells in the human body