1 year

100 years

1 month

10 years

brains

all of the above

a nerve

spinal cord

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

hormonal

proteins

telegraph

electrical impulses

stem cells

glial cells

muscle cells

prison cells

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

wire

the brain

muscle

nerve

skin cells

stem cells

liver cells

muscle cells