all of the above

a nerve

brains

spinal cord

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

they regenerate very quickly

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

liver cells

skin cells

muscle cells

stem cells

Purkinje neurons

pyramidal neurons

bipolar neurons

multipolar neurons

electrical impulses

telegraph

hormonal

proteins

glial cells

prison cells

stem cells

muscle cells

1 month

1 year

100 years

10 years

muscle

wire

nerve

the brain