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

10 years

1 year

100 years

1 month

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

the brain

nerve

wire

muscle

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

muscle cells

liver cells

stem cells

skin cells

telegraph

hormonal

proteins

electrical impulses

brains

all of the above

a nerve

spinal cord

muscle cells

glial cells

stem cells

prison cells