Nervous System

electrical impulses

hormonal

telegraph

proteins

10 years

1 year

100 years

1 month

a nerve

spinal cord

all of the above

brains

the brain

nerve

muscle

wire

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

glial cells

stem cells

muscle cells

prison cells

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

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

they regenerate very quickly

liver cells

stem cells

muscle cells

skin cells