brains

spinal cord

a nerve

all of the above

1 year

1 month

100 years

10 years

glial cells

prison cells

stem cells

muscle cells

multipolar neurons

Purkinje neurons

pyramidal neurons

bipolar neurons

skin cells

muscle cells

stem cells

liver cells

they are very long compared to other cells in the body

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

muscle

the brain

wire

nerve

hormonal

telegraph

electrical impulses

proteins

1 foot per second

150 meters per second

1 meter per second

100 miles per hour