100 years

1 month

1 year

10 years

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

electrical impulses

proteins

hormonal

telegraph

muscle

nerve

the brain

wire

stem cells

muscle cells

prison cells

glial cells

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

a nerve

spinal cord

all of the above

brains

skin cells

liver cells

muscle cells

stem cells