wire

muscle

nerve

the brain

electrical impulses

proteins

telegraph

hormonal

prison cells

glial cells

stem cells

muscle cells

1 month

1 year

100 years

10 years

muscle cells

skin cells

stem cells

liver cells

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

a nerve

all of the above

brains

spinal cord