stem cells

skin cells

muscle cells

liver cells

100 years

1 year

1 month

10 years

muscle cells

stem cells

glial cells

prison cells

nerve

muscle

wire

the brain

telegraph

electrical impulses

hormonal

proteins

brains

spinal cord

a nerve

all of the above

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body