The line 
is determined by the two points 
and 
, and the line 
is determined by the points 
and 
. Find the unit vectors 
along the line perpendicular to both 
and 
.
Definitions:
Oxygen
A chemical element essential for most forms of life on Earth, involved in cellular respiration and energy production.
Cardiovascular
Relating to the heart and blood vessels, concerning the circulatory system that transports blood throughout the body.
Musculoskeletal
Pertaining to the muscles and skeleton of the body, often relating to disorders or injuries.
Hypertension
A chronic medical condition in which the blood pressure in the arteries is persistently elevated, often leading to serious health risks.
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