they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

all of the above

brains

spinal cord

a nerve

wire

muscle

the brain

nerve

1 year

1 month

10 years

100 years

muscle cells

skin cells

liver cells

stem cells

prison cells

glial cells

stem cells

muscle cells

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

telegraph

proteins

hormonal

electrical impulses