they regenerate very quickly

they help carry oxygen to different parts of your body

they do not have a nucleus

they are very long compared to other cells in the body

1 year

10 years

1 month

100 years

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

electrical impulses

proteins

hormonal

telegraph

muscle cells

stem cells

skin cells

liver cells

the brain

wire

muscle

nerve

prison cells

muscle cells

stem cells

glial cells

a nerve

all of the above

brains

spinal cord

100 miles per hour

1 meter per second

1 foot per second

150 meters per second