spinal cord

brains

all of the above

a nerve

proteins

hormonal

electrical impulses

telegraph

muscle cells

glial cells

stem cells

prison cells

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

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

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

muscle

nerve

the brain

wire

stem cells

skin cells

muscle cells

liver cells

1 year

100 years

1 month

10 years