100 years

1 month

1 year

10 years

spinal cord

brains

all of the above

a nerve

telegraph

hormonal

proteins

electrical impulses

liver cells

skin cells

muscle cells

stem cells

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

nerve

wire

muscle

the brain

prison cells

glial cells

muscle cells

stem cells

100 miles per hour

150 meters per second

1 foot per second

1 meter per second