100 years

1 year

10 years

1 month

muscle cells

prison cells

glial cells

stem cells

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

all of the above

spinal cord

brains

a nerve

skin cells

muscle cells

stem cells

liver cells

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

telegraph

proteins

electrical impulses

hormonal

muscle

nerve

the brain

wire