stem cells

prison cells

glial cells

muscle cells

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

they regenerate very quickly

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

a nerve

spinal cord

all of the above

brains

muscle

wire

nerve

the brain

1 year

10 years

100 years

1 month

proteins

telegraph

hormonal

electrical impulses

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

muscle cells

liver cells

stem cells

skin cells