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

they do not have a nucleus

hormonal

electrical impulses

proteins

telegraph

1 foot per second

150 meters per second

1 meter per second

100 miles per hour

spinal cord

all of the above

brains

a nerve

stem cells

prison cells

muscle cells

glial cells

nerve

muscle

the brain

wire

100 years

1 month

10 years

1 year

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

skin cells

liver cells

stem cells

muscle cells