10 years

1 year

1 month

100 years

hormonal

proteins

telegraph

electrical impulses

spinal cord

a nerve

brains

all of the above

skin cells

stem cells

liver cells

muscle cells

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

muscle cells

prison cells

stem cells

glial cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

nerve

muscle

wire

the brain