1 year

100 years

10 years

1 month

liver cells

stem cells

skin cells

muscle cells

hormonal

telegraph

proteins

electrical impulses

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

muscle cells

stem cells

prison cells

glial cells

spinal cord

all of the above

brains

a nerve

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

muscle

wire

the brain

nerve

150 meters per second

1 meter per second

1 foot per second

100 miles per hour