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The Heart
Title: The Heart
Category: Science & Technology
Details: Words: 718 | Pages: 3.1 (approximately 235 words/page)
The Heart
The Heart
The aorta is the largest artery in the body. It extends upward from the left ventricle of the heart, arches over the heart to the left, and descends just in front of the spinal column. The first portion of the aorta is the "ascending aorta," which branches into the "arch of the aorta." Three major arteries originate from the aortic arch: the "brachiocephalic artery," which supplies blood to the brain and head; the left common carotid artery and the left subclavian artery.
Internally, …showed first 85 words of 718 total…
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…showed last 85 words of 718 total…cusps. It opens to allow blood to leave the left ventricle as it contracts. When the ventricular muscles relax, the valve closes to prevent blood from backing up into the ventricular chamber.
The inferior vena cava is a large vein ascending through the abdomen. It collects blood from the hepatic veins, the lumbar veins, gonadal veins, renal veins, and phrenic veins. These vessels usually drain regions that are supplied by arteries with corresponding names. The inferior vena cava enters the heart through the right atrium.
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