telegraph

proteins

hormonal

electrical impulses

1 meter per second

150 meters per second

100 miles per hour

1 foot per second

glial cells

prison cells

muscle cells

stem cells

10 years

100 years

1 year

1 month

stem cells

muscle cells

liver cells

skin cells

wire

nerve

the brain

muscle

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

brains

a nerve

spinal cord

all of the above