brains

all of the above

spinal cord

a nerve

10 years

1 month

100 years

1 year

electrical impulses

telegraph

hormonal

proteins

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

stem cells

liver cells

skin cells

muscle cells

wire

nerve

the brain

muscle

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

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

glial cells

stem cells

prison cells

muscle cells