stem cells

prison cells

glial cells

muscle cells

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

skin cells

stem cells

muscle cells

liver cells

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

wire

muscle

the brain

nerve

telegraph

hormonal

proteins

electrical impulses

1 year

10 years

100 years

1 month

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

a nerve

all of the above

brains

spinal cord