they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

muscle cells

prison cells

glial cells

stem cells

1 month

100 years

10 years

1 year

stem cells

liver cells

muscle cells

skin cells

all of the above

spinal cord

brains

a nerve

muscle

wire

the brain

nerve

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

electrical impulses

telegraph

hormonal

proteins