telegraph

hormonal

electrical impulses

proteins

1 foot per second

100 miles per hour

150 meters per second

1 meter per second

glial cells

muscle cells

stem cells

prison cells

they do not have a nucleus

they regenerate very quickly

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

skin cells

liver cells

muscle cells

stem cells

a nerve

spinal cord

brains

all of the above

10 years

1 month

1 year

100 years

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

wire

nerve

muscle

the brain