1 month

10 years

1 year

100 years

a nerve

all of the above

brains

spinal cord

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

liver cells

stem cells

skin cells

muscle cells

muscle

nerve

wire

the brain

hormonal

proteins

telegraph

electrical impulses

muscle cells

glial cells

stem cells

prison cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body