skin cells

muscle cells

stem cells

liver cells

100 years

10 years

1 month

1 year

electrical impulses

telegraph

proteins

hormonal

nerve

the brain

muscle

wire

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

100 miles per hour

1 meter per second

150 meters per second

1 foot per second

muscle cells

glial cells

stem cells

prison cells

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

all of the above

a nerve

brains

spinal cord