10 years

1 year

100 years

1 month

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

muscle cells

skin cells

stem cells

liver cells

all of the above

brains

a nerve

spinal cord

they do not have a nucleus

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

telegraph

electrical impulses

proteins

hormonal

stem cells

glial cells

muscle cells

prison cells

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

wire

muscle

nerve

the brain