telegraph

hormonal

proteins

electrical impulses

150 meters per second

100 miles per hour

1 meter per second

1 foot per second

liver cells

skin cells

muscle cells

stem cells

wire

nerve

muscle

the brain

glial cells

prison cells

stem cells

muscle cells

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

1 month

1 year

10 years

100 years

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

a nerve

all of the above

brains

spinal cord