Feature Article The Heart
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1The Human Heart is fully developed about
eight weeks after conception, when the embryo is only about 1" (2.5 cms long. The heart begins to beat even earlier--four
weeks after conception, when it is just a simple tube.
How many of you knew that?
Your heart is about the size of your fist.The human heart beats 60 – 100 times a minute. That is about
35 million times in a year. During an average lifetime, your heart will pump about 1 million barrels of blood
. (Enough to fill more than 3 super tankers.) When you are calm it circulates 5 to 6 litres of blood around the body
per minute and about 13 litres during vigorous exercise.
A Tireless, Powerful Muscle.
The heart performs enough work in one hour to lift 3,000 pounds
(1,400 kilograms)--roughly the weight of a small car--about 1 foot (30 centimeters)
off the ground
There are four chambers to the heart and the blood flows in a figure of eight pattern. Trivia question?
What do we have in common with birds. Answer they also have a heart with four chambers.
Do not take this for granted,
it is not normal for other creatures
Worms have five hearts. I have no idea how many chambers. Reptiles
usually have three chambers, but the crocodile has four. I have no more to say on that subject except to
shake my head at how little I know. However I have learned that the smaller you are the faster your heart beats.
Bird facts: (p m means per minute, but you knew that)
Domestic chicken 245 pm
Crow 345 pm House sparrow 460
Ruby Throated Humming Bird. 615
The heart of a large spider beats at 30 – 70 beats a minute, whereas a small spider heart can rise up to 200. Why
is this?
Now from small to gigantic.
Humpback whales grow to be about 52 feet (16 m) long, weigh 30-50 tons
(27-45 tonnes). Like us and birds, they have a four-chambered heart. An average humpback whale heart weighs about
as much as three average adult human beings.
The usual heart rate of large whales is from 10 to 30 beats per minute.
Scientist are still trying to figure out how to monitor whale heart rates. (Me to)
Now for a talented heart.
The little brown Myotis bat has a slow heartbeat of 100-200 beats
per minute. When they fly their heart beat is more 1000 beats per minute but when hibernating it’s drops to
five beats per minute.
The circulatory system of an octopus is closed and consists of one systemic heart, two bronchial hearts,two bronchial glands
(gills) and blood vessels.
Is nothing simple?
Valentine
The oldest known greeting card in existence, is a Valentine card made in the 1400's
and can be admired at the British Museum (London). Commercial valentines were introduced in the 1800's.
In the Middle
Ages, young men and women drew names from a bowl to see who their valentines would be. They would wear these names on
their sleeves for one week. To wear your heart on your sleeve now means that it is easy for other people to know how you are
feeling.
This is an endless subject but leaving the science out of it, let your heart be filled with joy and appreciation
for what you do have and take every opportunity to make the most of life.
http://www.ajc.com/news/content/health/0904/28emotions.html
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3) Sites for more information
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http://www.nimr.org/research/cardiac.html
http://www.heartinfo.org/ms/nav/faq/main.html
http://www.earthlife.net/birds/blood.html
From Donna L Watkins A Healing Moment Newsletter
Scientists have found a new link between emotions
and disease —
people who are angry, hostile and
depressed have higher levels of a protein in their
blood that has been associated
with heart disease.
Read more here:
http://www.ajc.com/news/content/health/0904/28emotions.html
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5) Did You Know Quick Fact / Question
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Which
animal has four knees?
Answer at the bottom of the page.
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Recommended Ezines and sites
If you are interested in writing this is a great site by Mary Anne Hahn
http://writesuccess.com/newsletter_pt.1.htm
http://writesuccess.com/newsletter_pt.2.htm
Welcome to Linda Locke's....
"MLMWOMAN NEWSLETTER
http://www.mlmwoman.com/issue96.htm
Great articles, helpful information
http://annamarketing.com/login.php
Very good newsletter with an unsual way of
getting into the site.
www.creativehomecomputing.com
Carols Creative Home Computing site. Very helpful.
Lots of good information
The Homestead Store and More........
For a little bit of Alaska and a lot of the Northwest,
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http://sunnydays4ever.com
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