brains

spinal cord

all of the above

a nerve

stem cells

prison cells

muscle cells

glial cells

muscle cells

liver cells

stem cells

skin cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

the brain

nerve

wire

muscle

hormonal

electrical impulses

proteins

telegraph

10 years

100 years

1 year

1 month