spinal cord

a nerve

brains

all of the above

nerve

muscle

the brain

wire

stem cells

muscle cells

skin cells

liver cells

multipolar neurons

pyramidal neurons

Purkinje neurons

bipolar neurons

1 meter per second

150 meters per second

1 foot per second

100 miles per hour

hormonal

telegraph

proteins

electrical impulses

100 years

1 month

10 years

1 year

muscle cells

stem cells

glial cells

prison cells

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body