spinal cord

a nerve

brains

all of the above

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

muscle

the brain

nerve

wire

electrical impulses

hormonal

proteins

telegraph

muscle cells

prison cells

glial cells

stem cells

10 years

1 year

1 month

100 years

1 meter per second

100 miles per hour

1 foot per second

150 meters per second

stem cells

skin cells

muscle cells

liver cells

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons