brains

all of the above

spinal cord

a nerve

muscle

wire

nerve

the brain

muscle cells

prison cells

glial cells

stem cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

electrical impulses

telegraph

hormonal

proteins

10 years

100 years

1 year

1 month

bipolar neurons

multipolar neurons

pyramidal neurons

Purkinje neurons

stem cells

muscle cells

liver cells

skin cells

they regenerate very quickly

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body