proteins

hormonal

electrical impulses

telegraph

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

skin cells

stem cells

muscle cells

liver cells

spinal cord

brains

all of the above

a nerve

100 years

10 years

1 month

1 year

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

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

prison cells

glial cells

stem cells

muscle cells

wire

muscle

the brain

nerve