they do not have a nucleus

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

100 years

10 years

1 year

1 month

muscle cells

prison cells

glial cells

stem cells

wire

muscle

the brain

nerve

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

electrical impulses

proteins

hormonal

telegraph

muscle cells

liver cells

skin cells

stem cells

all of the above

brains

spinal cord

a nerve

100 miles per hour

1 foot per second

150 meters per second

1 meter per second