liver cells

muscle cells

stem cells

skin cells

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

electrical impulses

hormonal

proteins

telegraph

a nerve

spinal cord

all of the above

brains

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

1 month

100 years

1 year

10 years

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

muscle cells

glial cells

stem cells

prison cells

wire

the brain

muscle

nerve