telegraph

electrical impulses

hormonal

proteins

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

prison cells

muscle cells

stem cells

glial cells

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

spinal cord

a nerve

brains

all of the above

100 years

10 years

1 year

1 month

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

liver cells

muscle cells

skin cells

stem cells

nerve

wire

the brain

muscle