100 years

1 month

1 year

10 years

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

wire

nerve

muscle

the brain

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

they do not have a nucleus

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

hormonal

proteins

electrical impulses

telegraph

brains

all of the above

a nerve

spinal cord

skin cells

liver cells

stem cells

muscle cells

prison cells

muscle cells

glial cells

stem cells