hormonal

proteins

electrical impulses

telegraph

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

glial cells

prison cells

muscle cells

stem cells

they do not have a nucleus

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

nerve

wire

muscle

the brain

1 year

100 years

1 month

10 years

liver cells

skin cells

muscle cells

stem cells

a nerve

brains

spinal cord

all of the above