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Learning Objectives
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Describe the location and position of the heart within the body cavity
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Describe the internal and external anatomy of the heart
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Identify the tissue layers of the heart
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Identify the veins and arteries of the coronary circulation system
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Trace the pathway of oxygenated and deoxygenated blood thorough the chambers of the heart
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16.1: Location of the Heart
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This page describes the human heart's location in the thoracic cavity, specifically in the mediastinum between the lungs and encased in the pericardium. Its base connects to major blood vessels at the third costal cartilage level, while the apex is slightly left of the sternum, aligning with the fourth and fifth ribs. Understanding the heart's orientation is essential for medical procedures such as auscultation and interpreting thoracic images, and it also affects the left lung's cardiac notch.
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16.2: Chambers and Circulation through the Heart
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This page explains the structure and function of the human heart, highlighting its four chambers—two atria and two ventricles—and the two main blood circulation circuits: the pulmonary circuit for oxygenation in the lungs and the systemic circuit for delivering oxygenated blood to the body. It outlines the flow of blood through these circuits, emphasizing the importance of this knowledge for health professionals.
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16.3: Membranes, Surface Features, and Layers
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This page examines the heart's structure and functionality, highlighting the pericardium's dual layers—fibrous for protection and serous for lubrication. It discusses the heart's four chambers, auricles for blood storage, and sulci containing major coronary vessels, emphasizing the importance of these features for proper heart function.
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16.4: Internal Structure of the Heart
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This page examines the heart's septa—walls that separate its chambers and are vital for its contraction cycle relating to the pulmonary and systemic circuits. It details the interatrial septum with the fossa ovalis from fetal life, the thicker interventricular septum separating ventricles, and the atrioventricular septum housing valves for unidirectional blood flow. Additionally, the cardiac skeleton provides structural support and aids in electrical conduction.
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16.5: Exercises
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This page presents lab exercises focused on heart anatomy and blood circulation. It includes drawing and labeling key heart components like the aorta, ventricles, pulmonary arteries, and valves, alongside the coronary arteries and conduction system elements such as the SA and AV nodes. These exercises serve as an educational tool to enhance understanding of heart structure and function through visual learning and labeling activities.
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16.6: MODELS- Heart and Torsos
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This page provides a detailed overview of the heart’s anatomy, covering its major components such as the inferior and superior vena cava, atria, ventricles, heart valves, and the aorta. It explains the heart's electrical system, tissue layers, and coronary circulation, while highlighting key features like auricles and the interventricular septum. The summary emphasizes the complex structure and function of the heart.
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16.7: Heart Dissection
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Heart Dissection: Anatomy & Physiology one organ at a time...Biology Corner https://www.biologycorner.com/anatomy/circulatory/heart/heart_dissection.html