they help carry oxygen to different parts of your body

they do not have a nucleus

they regenerate very quickly

they are very long compared to other cells in the body

skin cells

muscle cells

liver cells

stem cells

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

hormonal

telegraph

proteins

electrical impulses

spinal cord

brains

all of the above

a nerve

nerve

muscle

wire

the brain

10 years

1 month

100 years

1 year

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

muscle cells

glial cells

prison cells

stem cells