Page 14 - All about cells - FULL

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Cell Types

The human body consists of trillions
nerve cells
Nerve cells (neurons)
of cells, including some 200 different
cell types that vary greatly in size, blood cells
Blood cells
shape and function.

heart
lung cells Heart muscle cells
Lung cells
muscle cells

bone cells
Bone cells

Cell Size

Sperm cells are the tiniest human cells, a few
micrometers wide (1/12,000th of an inch); whereas
the longest cells, the neurons that run from the tip
of the big toe to the spinal cord, can be as long as
several feet in an average adult!

neuron

sperm

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