muscle cells

stem cells

skin cells

liver cells

they are very long compared to other cells in the body

they do not have a nucleus

they help carry oxygen to different parts of your body

they regenerate very quickly

nerve

the brain

wire

muscle

1 foot per second

150 meters per second

100 miles per hour

1 meter per second

proteins

hormonal

telegraph

electrical impulses

all of the above

spinal cord

brains

a nerve

Purkinje neurons

multipolar neurons

pyramidal neurons

bipolar neurons

stem cells

prison cells

muscle cells

glial cells

1 year

10 years

100 years

1 month