the brain

muscle

wire

nerve

multipolar neurons

bipolar neurons

pyramidal neurons

Purkinje neurons

liver cells

stem cells

skin cells

muscle cells

prison cells

muscle cells

glial cells

stem cells

they help carry oxygen to different parts of your body

they are very long compared to other cells in the body

they regenerate very quickly

they do not have a nucleus

a nerve

spinal cord

brains

all of the above

1 month

100 years

1 year

10 years

electrical impulses

proteins

hormonal

telegraph

150 meters per second

1 meter per second

100 miles per hour

1 foot per second