proteins

hormonal

telegraph

electrical impulses

muscle

nerve

wire

the brain

muscle cells

glial cells

stem cells

prison cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

1 year

100 years

10 years

1 month

a nerve

spinal cord

all of the above

brains

bipolar neurons

multipolar neurons

Purkinje neurons

pyramidal neurons

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

liver cells

stem cells

muscle cells

skin cells