telegraph

proteins

electrical impulses

hormonal

brains

all of the above

a nerve

spinal cord

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

skin cells

stem cells

muscle cells

liver cells

stem cells

glial cells

muscle cells

prison cells

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

1 year

1 month

10 years

100 years

wire

nerve

the brain

muscle