they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

telegraph

hormonal

electrical impulses

proteins

a nerve

all of the above

brains

spinal cord

10 years

1 year

1 month

100 years

liver cells

stem cells

skin cells

muscle cells

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

the brain

muscle

wire

nerve

stem cells

glial cells

muscle cells

prison cells

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons