liver cells

skin cells

muscle cells

stem cells

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

the brain

wire

muscle

nerve

electrical impulses

telegraph

hormonal

proteins

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

glial cells

prison cells

stem cells

muscle cells

brains

all of the above

spinal cord

a nerve

10 years

1 month

1 year

100 years