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

electrical impulses

hormonal

proteins

telegraph

muscle

nerve

wire

the brain

a nerve

brains

all of the above

spinal cord

1 month

10 years

1 year

100 years

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

muscle cells

prison cells

stem cells

glial cells

liver cells

stem cells

skin cells

muscle cells

150 meters per second

100 miles per hour

1 foot per second

1 meter per second