spinal cord

a nerve

all of the above

brains

electrical impulses

proteins

hormonal

telegraph

1 year

10 years

100 years

1 month

muscle cells

prison cells

glial cells

stem cells

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

nerve

muscle

the brain

wire

1 meter per second

1 foot per second

100 miles per hour

150 meters per second

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

muscle cells

liver cells

stem cells

skin cells