stem cells

prison cells

muscle cells

glial cells

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

the brain

muscle

wire

nerve

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

skin cells

stem cells

muscle cells

liver cells

spinal cord

brains

all of the above

a nerve

telegraph

electrical impulses

proteins

hormonal

10 years

1 month

100 years

1 year