spinal cord

brains

all of the above

a nerve

1 month

100 years

1 year

10 years

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

they do not have a nucleus

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

glial cells

prison cells

muscle cells

stem cells

the brain

muscle

nerve

wire

stem cells

muscle cells

skin cells

liver cells

hormonal

proteins

telegraph

electrical impulses