spinal cord

all of the above

brains

a nerve

muscle cells

skin cells

liver cells

stem cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

100 years

1 month

10 years

1 year

wire

the brain

nerve

muscle

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

electrical impulses

proteins

telegraph

hormonal

prison cells

glial cells

muscle cells

stem cells