stem cells

muscle cells

liver cells

skin cells

brains

a nerve

spinal cord

all of the above

the brain

wire

nerve

muscle

1 foot per second

150 meters per second

1 meter per second

100 miles per hour

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

electrical impulses

proteins

hormonal

telegraph

1 year

1 month

10 years

100 years

muscle cells

prison cells

glial cells

stem cells

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons