telegraph

hormonal

proteins

electrical impulses

multipolar neurons

Purkinje neurons

bipolar neurons

pyramidal neurons

1 foot per second

1 meter per second

100 miles per hour

150 meters per second

brains

all of the above

a nerve

spinal cord

1 month

1 year

10 years

100 years

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

nerve

wire

muscle

the brain

liver cells

muscle cells

stem cells

skin cells

muscle cells

prison cells

stem cells

glial cells