a nerve

spinal cord

all of the above

brains

1 year

1 month

100 years

10 years

wire

the brain

muscle

nerve

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

skin cells

stem cells

liver cells

muscle cells

Purkinje neurons

bipolar neurons

multipolar neurons

pyramidal neurons

1 foot per second

100 miles per hour

1 meter per second

150 meters per second

proteins

electrical impulses

hormonal

telegraph

prison cells

stem cells

muscle cells

glial cells