100 miles per hour

1 foot per second

1 meter per second

150 meters per second

proteins

hormonal

telegraph

electrical impulses

stem cells

glial cells

muscle cells

prison cells

they regenerate very quickly

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

skin cells

muscle cells

liver cells

stem cells

1 year

10 years

100 years

1 month

the brain

nerve

muscle

wire

brains

a nerve

spinal cord

all of the above

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons