150 meters per second

1 meter per second

1 foot per second

100 miles per hour

stem cells

glial cells

prison cells

muscle cells

stem cells

muscle cells

liver cells

skin cells

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

wire

nerve

muscle

the brain

electrical impulses

proteins

telegraph

hormonal

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

100 years

10 years

1 year

1 month

all of the above

a nerve

brains

spinal cord