telegraph

proteins

hormonal

electrical impulses

a nerve

spinal cord

all of the above

brains

muscle cells

skin cells

stem cells

liver cells

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

glial cells

stem cells

muscle cells

prison cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

10 years

100 years

1 month

1 year

the brain

muscle

nerve

wire