10 years

1 year

1 month

100 years

telegraph

proteins

electrical impulses

hormonal

brains

a nerve

all of the above

spinal cord

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

prison cells

stem cells

muscle cells

glial cells

the brain

muscle

nerve

wire

stem cells

muscle cells

liver cells

skin cells

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

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

they regenerate very quickly