proteins

telegraph

electrical impulses

hormonal

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

liver cells

skin cells

muscle cells

stem cells

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

brains

all of the above

a nerve

spinal cord

1 year

10 years

1 month

100 years

glial cells

prison cells

stem cells

muscle cells

muscle

wire

the brain

nerve

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body