brains

spinal cord

all of the above

a nerve

muscle cells

prison cells

glial cells

stem cells

1 year

100 years

1 month

10 years

telegraph

electrical impulses

hormonal

proteins

multipolar neurons

pyramidal neurons

bipolar neurons

Purkinje neurons

100 miles per hour

1 foot per second

150 meters per second

1 meter per second

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

muscle

nerve

wire

the brain

muscle cells

stem cells

liver cells

skin cells