wire

the brain

muscle

nerve

hormonal

telegraph

proteins

electrical impulses

all of the above

brains

a nerve

spinal cord

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

glial cells

stem cells

muscle cells

prison cells

stem cells

skin cells

liver cells

muscle cells

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

1 month

1 year

100 years

10 years

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