stem cells

skin cells

muscle cells

liver cells

the brain

wire

nerve

muscle

1 year

1 month

10 years

100 years

a nerve

brains

all of the above

spinal cord

telegraph

electrical impulses

hormonal

proteins

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

prison cells

glial cells

muscle cells

stem cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second