10 years

1 month

100 years

1 year

skin cells

muscle cells

stem cells

liver cells

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

prison cells

stem cells

glial cells

muscle cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

electrical impulses

proteins

hormonal

telegraph

wire

muscle

nerve

the brain

all of the above

brains

a nerve

spinal cord

1 meter per second

1 foot per second

150 meters per second

100 miles per hour