they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

wire

muscle

nerve

the brain

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

prison cells

stem cells

muscle cells

glial cells

10 years

1 month

100 years

1 year

muscle cells

skin cells

liver cells

stem cells

proteins

electrical impulses

telegraph

hormonal

all of the above

brains

a nerve

spinal cord

100 miles per hour

1 meter per second

150 meters per second

1 foot per second