10 years

1 year

1 month

100 years

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

they help carry oxygen to different parts of your body

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

nerve

muscle

wire

the brain

bipolar neurons

pyramidal neurons

Purkinje neurons

multipolar neurons

glial cells

prison cells

muscle cells

stem cells

a nerve

spinal cord

brains

all of the above

liver cells

stem cells

muscle cells

skin cells

telegraph

proteins

electrical impulses

hormonal