electrical impulses

telegraph

hormonal

proteins

spinal cord

a nerve

all of the above

brains

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons

liver cells

muscle cells

skin cells

stem cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle cells

prison cells

glial cells

stem cells

the brain

nerve

muscle

wire

10 years

1 month

1 year

100 years

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus