spinal cord

all of the above

brains

a nerve

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

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

skin cells

liver cells

stem cells

muscle cells

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

100 years

1 month

10 years

1 year

hormonal

proteins

telegraph

electrical impulses

the brain

nerve

wire

muscle

stem cells

muscle cells

prison cells

glial cells