hormonal

proteins

electrical impulses

telegraph

1 year

1 month

10 years

100 years

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

muscle

the brain

nerve

wire

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

skin cells

stem cells

liver cells

muscle cells

prison cells

muscle cells

glial cells

stem cells

all of the above

a nerve

brains

spinal cord