hormonal

electrical impulses

telegraph

proteins

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

skin cells

stem cells

liver cells

muscle cells

wire

muscle

nerve

the brain

muscle cells

stem cells

glial cells

prison cells

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

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

all of the above

brains

a nerve

spinal cord

10 years

1 year

1 month

100 years