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Human Heart - College Essay

Human Heart

Human Heart

Inside this Essay

1. Introduction to How Your Heart Works
2. The Human Heart
3. Chambers and Valves
4. Blood Flow
5. The Body's Electrical System
6. Blood Supply
7. Ever¬yone knows that the heart is a vital organ. We cannot live without our heart. However, when you get right down to it, the heart is just a pump. A complex and important one, yes, but still just a pump. As with all other pumps it can become clogged, break down and need repair. This is why it is critical that we know how the heart works. With a little knowledge about your heart and what is good or bad for it, you can significantly reduce your risk for heart disease.
8. Heart disease is the leading ...

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a heart - be merciful
• change of heart - change your mind
• to know something by heart - memorize something
• broken heart - to lose love
• heartfelt - deeply felt
• have your heart in the right place - to be kind
• cry your heart out - to grieve
• heavy heart - sadness
• have your heart set on - to want something badly

Certainly no other bodily organ elicits this kind of response. When was the last time you had a heavy pancreas?

In this article, we will look at this important organ so that you can understand exactly what makes your heart tick.

The Human Heart

The heart is a hollow, cone-shaped muscle located between the lungs and behind the sternum (breastbone). Two-thirds of the heart is located to the left of the midline of the body and 1/3 is to the right (see Figure 1).

Figure 1
[Please note - Medical illustrations assume that the patient is
facing you so that the right and left correspond to the patient's
right and left. That's why the ...

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prevents blood from flowing backwards. When each chamber contracts, the valve at its exit opens. When it is finished contracting, the valve closes so that blood does not flow backwards.

The chamber has a sort of one-way valve at its exit that prevents blood from flowing backwards. When each chamber contracts, the valve at its exit opens. When it is finished contracting, the valve closes so that blood does not flow backwards.

Pulse Rates

Everyone's pulse (average heart rate per minute) changes as we age. Here is a chart of average pulse rates at different ages:

Age Pulse
Newborn 130
3 months 140
6 months 130
1 year 120
2 years 115
3 years 100
4 years 100
6 ...

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PAPER DETAILS

Added: 10/1/2011 08:52:15 AM
Submitted By: aamirmalik12
Category: Health & Medicine
Type: Premium Paper
Words: 2259
Pages: 9

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