100 years

1 year

10 years

1 month

liver cells

muscle cells

skin cells

stem cells

electrical impulses

proteins

telegraph

hormonal

glial cells

prison cells

muscle cells

stem cells

wire

nerve

muscle

the brain

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

spinal cord

a nerve

all of the above

brains

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body