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

they do not have a nucleus

100 years

10 years

1 month

1 year

stem cells

skin cells

muscle cells

liver cells

prison cells

stem cells

muscle cells

glial cells

hormonal

telegraph

proteins

electrical impulses

nerve

muscle

the brain

wire

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

all of the above

brains

spinal cord

a nerve

1 foot per second

150 meters per second

100 miles per hour

1 meter per second