proteins

telegraph

electrical impulses

hormonal

muscle

wire

nerve

the brain

1 month

1 year

100 years

10 years

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

skin cells

muscle cells

liver cells

stem cells

a nerve

spinal cord

all of the above

brains

stem cells

glial cells

muscle cells

prison cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly