brains

spinal cord

all of the above

a nerve

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

hormonal

proteins

electrical impulses

telegraph

nerve

the brain

wire

muscle

1 month

100 years

1 year

10 years

150 meters per second

1 meter per second

100 miles per hour

1 foot per second

skin cells

muscle cells

stem cells

liver cells

glial cells

prison cells

muscle cells

stem cells

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons