100 miles per hour

150 meters per second

1 foot per second

1 meter per second

muscle

nerve

the brain

wire

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

electrical impulses

telegraph

hormonal

proteins

stem cells

skin cells

muscle cells

liver cells

glial cells

stem cells

prison cells

muscle cells

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

brains

a nerve

all of the above

spinal cord

1 month

1 year

10 years

100 years