100 years

10 years

1 month

1 year

proteins

hormonal

electrical impulses

telegraph

brains

a nerve

spinal cord

all of the above

stem cells

muscle cells

glial cells

prison cells

100 miles per hour

150 meters per second

1 foot per second

1 meter per second

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

nerve

wire

the brain

muscle

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

liver cells

skin cells

stem cells

muscle cells