10 years

100 years

1 month

1 year

spinal cord

brains

a nerve

all of the above

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

prison cells

muscle cells

stem cells

glial cells

muscle

wire

the brain

nerve

stem cells

muscle cells

skin cells

liver cells

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

hormonal

electrical impulses

telegraph

proteins

1 foot per second

1 meter per second

100 miles per hour

150 meters per second