hormonal

proteins

telegraph

electrical impulses

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

stem cells

muscle cells

liver cells

skin cells

1 year

1 month

100 years

10 years

muscle

wire

nerve

the brain

brains

all of the above

spinal cord

a nerve

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

prison cells

glial cells

muscle cells

stem cells