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

muscle cells

stem cells

prison cells

glial cells

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

hormonal

proteins

electrical impulses

telegraph

skin cells

stem cells

liver cells

muscle cells

1 year

100 years

10 years

1 month

all of the above

brains

a nerve

spinal cord

muscle

nerve

the brain

wire

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons