stem cells

muscle cells

skin cells

liver cells

proteins

hormonal

electrical impulses

telegraph

10 years

1 year

100 years

1 month

prison cells

stem cells

muscle cells

glial cells

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

wire

muscle

nerve

the brain

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

all of the above

a nerve

brains

spinal cord

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons