the brain

muscle

wire

nerve

stem cells

prison cells

muscle cells

glial cells

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

muscle cells

skin cells

liver cells

stem cells

electrical impulses

hormonal

telegraph

proteins

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

1 year

10 years

1 month

100 years

all of the above

spinal cord

a nerve

brains