1 month

1 year

10 years

100 years

brains

spinal cord

a nerve

all of the above

skin cells

stem cells

muscle cells

liver cells

proteins

hormonal

electrical impulses

telegraph

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

wire

the brain

nerve

muscle

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

they do not have a nucleus

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

stem cells

muscle cells

prison cells

glial cells