proteins

electrical impulses

hormonal

telegraph

prison cells

glial cells

muscle cells

stem cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

10 years

1 month

100 years

1 year

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

brains

all of the above

a nerve

spinal cord

nerve

the brain

muscle

wire

muscle cells

skin cells

stem cells

liver cells

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons