the brain

nerve

wire

muscle

skin cells

stem cells

liver cells

muscle cells

they are very long compared to other cells in the body

they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

brains

all of the above

spinal cord

a nerve

bipolar neurons

Purkinje neurons

pyramidal neurons

multipolar neurons

muscle cells

glial cells

prison cells

stem cells

hormonal

telegraph

proteins

electrical impulses

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

1 month

10 years

100 years

1 year