The Human Heart...
Season 3 Episode 7:
Coach in Love (Part 2)
Airdate:
November 15 1984 |
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Coach is in love and innocently asks "The human heart, who
knows how it works?"
Cliff does... |
It's
essentially an involuntary muscle coach, activated by
electrical impulses...
(Coach: "Exactly,
no one, it works by feelings.")
The truth:
Essentially Cliff was on the right track, maybe that's why the
writer cut him off.
The contractions of the heart are caused by electrical impulses
which start on the right side of the upper chamber in an
area called the sinus node.
The impulse leaves the sinus node and travels a set path
through the upper chambers, the atria, causing them to contract
and squeeze blood into the lower chambers.
The electrical signal then reaches the atrioventricular (AV)
node. The AV node is in the middle of the heart, between the
atrium and the ventricle. The signal is delayed in the AV node
and then spreads through the lower chambers. The ventricles
contract, sending blood throughout the body. The entire
heartbeat starts again, beginning with an impulse in the sinus
node.
In an average lifetime this procedure occurs some 2 1/2 billion
times.
Cliff Recommends:
Washington Nationals Baseball
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