liver cells

muscle cells

stem cells

skin 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

muscle

wire

nerve

the brain

muscle cells

prison cells

glial cells

stem cells

100 years

1 month

1 year

10 years

all of the above

a nerve

brains

spinal cord

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

150 meters per second

1 foot per second

1 meter per second

100 miles per hour

proteins

electrical impulses

hormonal

telegraph