they do not have a nucleus

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

100 years

10 years

1 month

1 year

skin cells

muscle cells

liver cells

stem cells

stem cells

glial cells

muscle cells

prison cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

nerve

muscle

the brain

wire

telegraph

proteins

electrical impulses

hormonal

all of the above

a nerve

brains

spinal cord