1 meter per second

100 miles per hour

1 foot per second

150 meters per second

a nerve

spinal cord

all of the above

brains

they do not have a nucleus

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

stem cells

muscle cells

liver cells

skin cells

10 years

1 month

100 years

1 year

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

nerve

the brain

muscle

wire

telegraph

proteins

electrical impulses

hormonal

glial cells

muscle cells

prison cells

stem cells