telegraph

hormonal

proteins

electrical impulses

skin cells

muscle cells

liver cells

stem cells

glial cells

stem cells

prison cells

muscle cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they do not have a nucleus

they regenerate very quickly

pyramidal neurons

Purkinje neurons

multipolar neurons

bipolar neurons

brains

all of the above

spinal cord

a nerve

1 meter per second

1 foot per second

150 meters per second

100 miles per hour

1 year

100 years

10 years

1 month

muscle

nerve

wire

the brain