Change: * This video identifies the basic functions of the heart, including the separation of chambers, the different valves involved, the flow of blood through the   View changes from previous version. (Word count: 3112)

Change: Medianstenium,Mediastenium, which is the cavity between the lungs. The heart is a hollow muscular chambered organ with the Apex of the heart (pointed end) pointing downward and towards the left hip and the Base of the heart (the top) facing upwards toward the right shoulder. Basics of the HEART   View changes from previous version. (Word count: 3040)

Change: Basic Anatomy of the Heart About the heart The heart is the hardest working muscle in the human body. Located almost in the center of the chest, the adult human heart   View changes from previous version. (Word count: 2519)

Change: Cardiac Development & Aging, Cardiac Functions & Structures, Cardiac Clinical View, Cardiac News Articles, and Cardiac Review Learning Objectives Detail the blood pathway through the chambers of the heart Identify the mechanisms that regulate blood pressure Understand the three main functions   View changes from previous version. (Word count: 2520)

Change: The regurgitation valve(s) does not close completely, causing the blood to flow backward instead of forward through the valve. stenosisThe valve(s) opening becomes narrowed or does not form properly, inhibiting the flow of blood out   View changes from previous version. (Word count: 2515)

Change: day or about 2.5 billion times during a 72 year lifetime? Did you know that the heart can increase its output up to 5 or 6 fold when the body requires more oxygen or nutrients? Did you know that the blood in   View changes from previous version. (Word count: 2499)

Change:  The heart consists of four chambers, two atria (upper chambers) and two ventricles (lower chambers). There is a valve through which blood passes before leaving   View changes from previous version. (Word count: 2490)

Change: Did you know that the heart in one lifetime will pump approximately 1 million barrels (200,000,000 liters) of blood? Introduction to the HUMAN HEARTThe Heart also known as the Ol' ticker or the window into your   View changes from previous version. (Word count: 1265)

Change: hour or 108,000 times per day? Did you know that the blood in your body travels approximately 12 miles as it is circulated throughout the body each day? Did you know that your heart is approximately the size of   View changes from previous version. (Word count: 1228)

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 1221)