they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

a nerve

brains

all of the above

spinal cord

100 years

1 year

10 years

1 month

telegraph

electrical impulses

hormonal

proteins

stem cells

muscle cells

glial cells

prison cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

muscle

wire

the brain

nerve

muscle cells

stem cells

liver cells

skin cells