10 years

1 year

100 years

1 month

stem cells

liver cells

muscle cells

skin cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

all of the above

brains

spinal cord

a nerve

telegraph

hormonal

electrical impulses

proteins

muscle cells

glial cells

stem cells

prison cells

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

muscle

the brain

nerve

wire

they regenerate very quickly

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