they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

muscle

nerve

wire

the brain

hormonal

telegraph

electrical impulses

proteins

1 year

1 month

10 years

100 years

all of the above

spinal cord

a nerve

brains

prison cells

muscle cells

glial cells

stem cells

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

liver cells

stem cells

skin cells

muscle cells