brains

a nerve

spinal cord

all of the above

1 year

1 month

10 years

100 years

stem cells

liver cells

skin cells

muscle cells

100 miles per hour

1 meter per second

1 foot per second

150 meters per second

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

they regenerate very quickly

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

wire

muscle

the brain

nerve

hormonal

proteins

electrical impulses

telegraph

muscle cells

stem cells

glial cells

prison cells