spinal cord

brains

a nerve

all of the above

stem cells

muscle cells

liver cells

skin cells

10 years

1 year

1 month

100 years

prison cells

muscle cells

glial cells

stem cells

they do not have a nucleus

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

wire

muscle

the brain

nerve

telegraph

proteins

hormonal

electrical impulses

100 miles per hour

1 foot per second

1 meter per second

150 meters per second

multipolar neurons

bipolar neurons

Purkinje neurons

pyramidal neurons