100 years

1 year

1 month

10 years

100 miles per hour

150 meters per second

1 meter per second

1 foot per second

pyramidal neurons

multipolar neurons

bipolar neurons

Purkinje neurons

hormonal

electrical impulses

telegraph

proteins

stem cells

glial cells

muscle cells

prison cells

a nerve

spinal cord

all of the above

brains

wire

muscle

the brain

nerve

muscle cells

liver cells

skin cells

stem cells

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body