stem cells

skin cells

liver cells

muscle cells

a nerve

spinal cord

brains

all of the above

they regenerate very quickly

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

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

10 years

1 month

100 years

1 year

hormonal

proteins

telegraph

electrical impulses

the brain

nerve

muscle

wire

prison cells

glial cells

stem cells

muscle cells

1 foot per second

150 meters per second

100 miles per hour

1 meter per second