skin cells

muscle cells

liver cells

stem cells

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

a nerve

brains

spinal cord

all of the above

muscle cells

glial cells

stem cells

prison cells

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

nerve

muscle

the brain

wire

hormonal

telegraph

proteins

electrical impulses

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

10 years

1 year

100 years

1 month