they do not have a nucleus

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

all of the above

spinal cord

brains

a nerve

wire

muscle

nerve

the brain

electrical impulses

hormonal

proteins

telegraph

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

glial cells

muscle cells

prison cells

stem cells

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

1 year

1 month

10 years

100 years

skin cells

stem cells

liver cells

muscle cells