HKR 2311 Lecture 6: HKR2311 - Unit 6
14 Feb 2017
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Document Summary
Blood as carried away from the heart by arteries, and veins return the blood back to the heart. Capillaries are smaller blood vessels that interconnect the smaller arteries to the smallest veins. In addition, they provide the site of fluid exchange between the blood and surrounding tissues. Anatomy of the heart: the heart is surrounded by a pericardial cavity. The lining of the pericardial cavity is called the pericardium. The pericardium covers the outer surface of the heart and lines the inner surface of the pericardial sac. The pericardial sac is fibrous, as is responsible for the stabilization of the heart: the space within the pericardium in the pericardial cavity contains pericardial fluid. This fluid acts as a lubricant to reduce friction between the opposing surfaces as the heart beats. The heart wall: the heart is formed from three separate layers: It is the muscular wall of the heart. The cardiac muscles framework is spiraled downwards towards the apex.
