electrical impulses

telegraph

hormonal

proteins

150 meters per second

1 meter per second

1 foot per second

100 miles per hour

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

prison cells

stem cells

glial cells

muscle cells

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

1 year

10 years

1 month

100 years

spinal cord

all of the above

brains

a nerve

liver cells

muscle cells

stem cells

skin cells

wire

the brain

muscle

nerve