a nerve

brains

spinal cord

all of the above

wire

muscle

nerve

the brain

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

hormonal

telegraph

electrical impulses

proteins

liver cells

stem cells

skin cells

muscle cells

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

10 years

100 years

1 year

1 month

stem cells

glial cells

prison cells

muscle cells

150 meters per second

100 miles per hour

1 meter per second

1 foot per second