10 years

100 years

1 year

1 month

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

pyramidal neurons

multipolar neurons

Purkinje neurons

bipolar neurons

proteins

electrical impulses

hormonal

telegraph

a nerve

spinal cord

all of the above

brains

stem cells

skin cells

muscle cells

liver cells

wire

the brain

muscle

nerve

stem cells

prison cells

glial cells

muscle cells

150 meters per second

1 meter per second

1 foot per second

100 miles per hour