1 year

1 month

10 years

100 years

proteins

telegraph

electrical impulses

hormonal

liver cells

skin cells

stem cells

muscle cells

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

muscle cells

stem cells

glial cells

prison cells

spinal cord

a nerve

all of the above

brains

the brain

nerve

wire

muscle

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons