stem cells

prison cells

muscle cells

glial cells

telegraph

electrical impulses

hormonal

proteins

all of the above

a nerve

brains

spinal cord

1 year

10 years

1 month

100 years

bipolar neurons

Purkinje neurons

multipolar neurons

pyramidal neurons

1 meter per second

100 miles per hour

150 meters per second

1 foot per second

muscle cells

stem cells

skin cells

liver cells

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

muscle

nerve

wire

the brain