An anonymous observer
wrote that it "doesn't complain about the condition of the weather, seeks
no 'social security' and never asks for a vacation. It will work best when
treated well, but will do its utmost to give good service when working
conditions are unduly taxing its strength." No, it isn't your dog--man's
best friend--who sits by the gate and awaits your arrival with wagging tail. It
is your heart, located six inches below your collarbone slightly off-center on
the left side of your body.
First, a few words
about this amazing part of your body we call the heart and how marvelous it is,
something unduplicated by science and technology. Your heart is a muscle about
the size of your fist. When you were born your heart weighed less than one
ounce, and if you are an adult male your heart weighs about 11 ounces; 9 ounces
if you are a female. That means your life is dependent upon a muscle that
weighs less than a pound, or 400 grams.
It's the most
critical part of your body, too, one which works day and night, never takes
vacations, seldom gets rest, and never goes to sleep. There are four chambers
in your heart with valves between them, and these cooperate in pumping blood
through a vast network of veins, arteries, and capillaries, bringing oxygen and
nourishment to your body.
To a far greater
degree than we acknowledge or even ponder, we are dependent on this muscle's
silent performance, because if it quits, you do, as well – and very quickly,
too. You can get along quite well with just one eye, or still function with the
loss of hearing in one ear. Though it's sad, you can survive with the loss of
an arm or leg. But when your heart becomes diseased, unless surgery can correct
the situation, you are in grave trouble.
Based on a heartbeat
of 70 times a minute, your heart beats 4200 times an hour, 100,800 times every
24 hours, and over 36 million times a year. By the time you reach 70 years of
age, your heart has beaten over 2.5 trillion times.
Connected to your
heart is a vast network of veins and arteries--a kind of built-in
transportation system for your blood--which, if connected end to end, would
stretch between 60,000 and 100,000 miles, or reach up to four times around the
world at the equator. The volume of blood pumped by your heart in a year is
about 650,000 gallons or 2,460,250 liters. That's enough to fill more than 81
standard railroad tank cars. Your beating heart generates enough energy in a twelve-hour
period to lift one of those tank cars weighing 65 tons, a foot off the ground.
Some 3000 years ago
the Psalmist said, "I praise you because I am fearfully and wonderfully
made; your works are wonderful, I know that full well" (Psalms 139:14). And
that was long before the days of Dr. Christiaan Barnard of South Africa, who
performed the first heart transplant, or before Dr. Tom Fogarty invented the
little plastic balloon which smoothes out clogged arteries or doctors knew how
to insert little stainless steel stents which pop against weakened arteries and
keep them open, thus insuring the flow of blood to your heart.
Your heart is an
awesome marvel which is the key to keeping you alive and healthy. When you take
care of it, it takes good care of you, but when you abuse it and fail to
nourish it, like anything mechanical it will wear out.
Resource reading:
Psalm 9.
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