they regenerate very quickly

they do not have a nucleus

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

wire

the brain

muscle

nerve

brains

all of the above

a nerve

spinal cord

1 month

1 year

100 years

10 years

150 meters per second

1 foot per second

100 miles per hour

1 meter per second

muscle cells

stem cells

liver cells

skin cells

pyramidal neurons

Purkinje neurons

bipolar neurons

multipolar neurons

telegraph

electrical impulses

proteins

hormonal

muscle cells

prison cells

glial cells

stem cells