liver cells

stem cells

skin cells

muscle cells

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

brains

all of the above

a nerve

spinal cord

electrical impulses

telegraph

hormonal

proteins

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

they do not have a nucleus

stem cells

muscle cells

glial cells

prison cells

muscle

nerve

the brain

wire

1 month

100 years

10 years

1 year

Purkinje neurons

bipolar neurons

pyramidal neurons

multipolar neurons