10 years

100 years

1 year

1 month

muscle cells

skin cells

liver cells

stem cells

proteins

telegraph

electrical impulses

hormonal

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

muscle

wire

nerve

the brain

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

brains

all of the above

a nerve

spinal cord

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

stem cells

prison cells

glial cells

muscle cells