they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

spinal cord

all of the above

brains

a nerve

nerve

the brain

wire

muscle

muscle cells

stem cells

prison cells

glial cells

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

10 years

1 year

1 month

100 years

telegraph

electrical impulses

proteins

hormonal

Purkinje neurons

multipolar neurons

bipolar neurons

pyramidal neurons

liver cells

stem cells

muscle cells

skin cells