stem cells

prison cells

glial cells

muscle cells

nerve

the brain

muscle

wire

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

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

10 years

100 years

1 month

1 year

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

muscle cells

skin cells

liver cells

stem cells

electrical impulses

telegraph

hormonal

proteins

brains

all of the above

spinal cord

a nerve