wire

muscle

the brain

nerve

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

electrical impulses

proteins

hormonal

telegraph

prison cells

glial cells

stem cells

muscle cells

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

10 years

100 years

1 year

1 month

muscle cells

skin cells

stem cells

liver 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

spinal cord

brains

all of the above

a nerve