1 month

1 year

100 years

10 years

wire

the brain

nerve

muscle

telegraph

electrical impulses

hormonal

proteins

stem cells

muscle cells

liver cells

skin cells

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

stem cells

glial cells

muscle cells

prison cells

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

spinal cord

a nerve

brains

all of the above