proteins

electrical impulses

telegraph

hormonal

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

100 years

10 years

1 month

1 year

nerve

muscle

the brain

wire

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

glial cells

muscle cells

prison cells

stem cells

brains

a nerve

all of the above

spinal cord

liver cells

muscle cells

stem cells

skin cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly