liver cells

stem cells

skin cells

muscle cells

10 years

1 year

100 years

1 month

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

prison cells

glial cells

muscle cells

stem cells

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

a nerve

spinal cord

brains

all of the above

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

proteins

electrical impulses

hormonal

telegraph

wire

nerve

the brain

muscle