prison cells

muscle cells

glial cells

stem cells

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

liver cells

muscle cells

stem cells

skin cells

1 month

100 years

10 years

1 year

spinal cord

brains

all of the above

a nerve

bipolar neurons

pyramidal neurons

multipolar neurons

Purkinje neurons

the brain

wire

muscle

nerve

electrical impulses

telegraph

hormonal

proteins

150 meters per second

1 meter per second

100 miles per hour

1 foot per second