wire

nerve

muscle

the brain

pyramidal neurons

bipolar neurons

Purkinje neurons

multipolar neurons

proteins

telegraph

hormonal

electrical impulses

brains

a nerve

spinal cord

all of the above

100 years

1 month

10 years

1 year

stem cells

prison cells

muscle cells

glial cells

stem cells

muscle cells

liver cells

skin cells

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

1 foot per second

100 miles per hour

150 meters per second

1 meter per second