hormonal

proteins

telegraph

electrical impulses

muscle cells

stem cells

liver cells

skin cells

pyramidal neurons

bipolar neurons

multipolar neurons

Purkinje neurons

stem cells

glial cells

prison cells

muscle cells

100 years

10 years

1 year

1 month

wire

the brain

nerve

muscle

150 meters per second

100 miles per hour

1 foot per second

1 meter per second

they help carry oxygen to different parts of your body

they regenerate very quickly

they do not have a nucleus

they are very long compared to other cells in the body

spinal cord

brains

all of the above

a nerve