they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

stem cells

muscle cells

skin cells

liver cells

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

a nerve

spinal cord

brains

all of the above

proteins

hormonal

electrical impulses

telegraph

wire

nerve

the brain

muscle

glial cells

prison cells

muscle cells

stem cells

1 year

1 month

100 years

10 years

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons