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

proteins

hormonal

telegraph

electrical impulses

muscle cells

liver cells

stem cells

skin cells

prison cells

muscle cells

glial cells

stem cells

all of the above

a nerve

brains

spinal cord

the brain

nerve

wire

muscle

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

1 month

10 years

100 years

1 year