brains

spinal cord

all of the above

a nerve

1 month

100 years

1 year

10 years

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

the brain

wire

muscle

nerve

hormonal

electrical impulses

telegraph

proteins

1 foot per second

1 meter per second

150 meters per second

100 miles per hour

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

glial cells

prison cells

muscle cells

stem cells

muscle cells

skin cells

liver cells

stem cells