1 year

10 years

100 years

1 month

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

proteins

electrical impulses

telegraph

hormonal

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

stem cells

muscle cells

skin cells

liver cells

muscle

nerve

wire

the brain

stem cells

muscle cells

prison cells

glial cells

brains

all of the above

a nerve

spinal cord