{"id":137,"date":"2016-04-24T18:02:33","date_gmt":"2016-04-24T18:02:33","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/?post_type=chapter&p=137"},"modified":"2016-07-03T16:09:50","modified_gmt":"2016-07-03T16:09:50","slug":"internal-structure-of-the-heart","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/suny-contemporaryhealthissues\/chapter\/internal-structure-of-the-heart\/","title":{"raw":"Internal Structure of the Heart","rendered":"Internal Structure of the Heart"},"content":{"raw":"

Internal Structure of the Heart<\/h1>\r\n

Recall that the heart\u2019s contraction cycle follows a dual pattern of circulation\u2014the pulmonary (lungs)and systemic (body) circuits\u2014because of the pairs of chambers that pump blood into the circulation. In order to develop a more precise understanding of cardiac function, it is first necessary to explore the internal anatomical structures in more detail.<\/p>\r\n

The word septum is derived from the Latin for \u201csomething that encloses;\u201d in this case, a septum<\/span> (plural = septa) refers to a wall or partition that divides the heart into chambers.<\/p>\r\n

Valves of the Heart: t<\/span>he septum between the atria and ventricles is known as the atrioventricular septum<\/span>. It is marked by the presence of four openings that allow blood to move from the atria into the ventricles and from the ventricles into the pulmonary trunk and aorta. Located in each of these openings between the atria and ventricles is a valve, a specialized structure that ensures one-way flow<\/strong> of blood<\/span>. The valves between the atria and ventricles are known generically as\u00a0 the tricuspid<\/span> (right side)and the bicuspid<\/span> (left side) va<\/strong>lve. The valves at the openings that lead to the pulmonary trunk and aorta are known generically as the pulmonary<\/span> and the aortic<\/span> valve.<\/p>\r\n

Structures of the Heart<\/p>\r\n\r\n

\"In<\/span>\r\n
This anterior view of the heart shows the four chambers, the major vessels, and their early branches as well as the valves.<\/figcaption><\/figure>","rendered":"

Internal Structure of the Heart<\/h1>\n

Recall that the heart\u2019s contraction cycle follows a dual pattern of circulation\u2014the pulmonary (lungs)and systemic (body) circuits\u2014because of the pairs of chambers that pump blood into the circulation. In order to develop a more precise understanding of cardiac function, it is first necessary to explore the internal anatomical structures in more detail.<\/p>\n

The word septum is derived from the Latin for \u201csomething that encloses;\u201d in this case, a septum<\/span> (plural = septa) refers to a wall or partition that divides the heart into chambers.<\/p>\n

Valves of the Heart: t<\/span>he septum between the atria and ventricles is known as the atrioventricular septum<\/span>. It is marked by the presence of four openings that allow blood to move from the atria into the ventricles and from the ventricles into the pulmonary trunk and aorta. Located in each of these openings between the atria and ventricles is a valve, a specialized structure that ensures one-way flow<\/strong> of blood<\/span>. The valves between the atria and ventricles are known generically as\u00a0 the tricuspid<\/span> (right side)and the bicuspid<\/span> (left side) va<\/strong>lve. The valves at the openings that lead to the pulmonary trunk and aorta are known generically as the pulmonary<\/span> and the aortic<\/span> valve.<\/p>\n

Structures of the Heart<\/p>\n

\"In<\/span>
This anterior view of the heart shows the four chambers, the major vessels, and their early branches as well as the valves.<\/figcaption><\/figure>\n\n\t\t\t
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Candela Citations<\/h3>\n\t\t\t\t\t
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