they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

1 year

1 month

10 years

100 years

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

stem cells

muscle cells

glial cells

prison cells

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

the brain

wire

muscle

nerve

liver cells

muscle cells

skin cells

stem cells

all of the above

brains

a nerve

spinal cord

hormonal

telegraph

electrical impulses

proteins