1 month

10 years

1 year

100 years

a nerve

all of the above

spinal cord

brains

muscle cells

glial cells

stem cells

prison cells

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

skin cells

liver cells

stem cells

muscle cells

wire

the brain

muscle

nerve

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

electrical impulses

proteins

hormonal

telegraph

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body