10 years

1 month

1 year

100 years

stem cells

liver cells

skin cells

muscle cells

spinal cord

a nerve

brains

all of the above

telegraph

electrical impulses

proteins

hormonal

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

the brain

muscle

wire

nerve

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

stem cells

prison cells

glial cells

muscle cells

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons