skin cells

muscle cells

liver cells

stem cells

electrical impulses

hormonal

proteins

telegraph

muscle cells

prison cells

glial cells

stem cells

all of the above

brains

spinal cord

a nerve

10 years

100 years

1 month

1 year

the brain

wire

nerve

muscle

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body