The descending aorta is responsible for blood flow

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neck and superior portion of the body. The descending aorta is responsible for blood flow the inferior portion of the body. As oxygenated blood travels throughout both parts of the body, it is separated via arteries, arterioles, and then finally capillaries where it exchanges O2 for CO2 similarly to that of exchange of gasses in the lungs, the only difference being is that the O2 is leaving the vessels and the veins then will transport the newly deoxygenated blood back to the right ventricle via the inferior and superior vena cava (Betts, 2017). 5. In your own words describe the anatomy and function associated with the pericardium. The pericardium is a (2-layer membrane) fluid filed sac that surrounds the heart, it’s function is to protect the heart limiting motion and reducing friction when it contracts (Betts, 2017). Part 01 Procedure: Heart Specimen Dissection 1. Utilizing the Rasmussen College Dissection Guide – Heart Unit, follow the protocol and instructions to complete the heart specimen dissection for the sheep heart and the heart dissection of the pig specimen. Locate the anatomical structures listed in Appendix A while utilizing the dissection guide. 2. Once completed, clean and disinfect your workstation, properly dispose and/or store your specimens and clean any lab equipment that was utilized. Part 02 Procedure: Cardiac Tissue 1. Utilizing the microscope and a prepared slide of cardiac tissue, examination the histological features of cardiac tissue. Make sure you are able to observe the following anatomical structures: Cell shape, striations, nucleus location, and intercalated discs. 2. Describe your observations of cardiac tissue:
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Cardiac tissues appear roughly long, thin rectangles, and are stacked on top of each other in an offset manner similar to bricks. Intercalated discs seem to join the cells together on the short ends. The nuclei are scattered throughout the cells with no apparent pattern, and the striations do not have any pattern. Part 03 Procedure: Blood Flow and Cardiac Conduction System 1. Utilizing the pictures found in Appendix B and C, be able to describe the flow of blood through the body’s circuits and heart to other classmates and the lab instructor. Blood enters the heart through the right atria via the inferior and superior vena cava, from there it travels through the tricuspid valve into the right ventricle. Pulmonary Circulation: The blood continues through the Pulmonary valve to the Pulmonary arteries and into the lungs where it breaks down in to smaller arteries until the capillaries of the lungs converge with alveoli to exchange O2 for CO2 through the smallest and thinnest vessels of the body. After gasses are exchanged, the now oxygenated blood is carried away from the lungs back to the heart via pulmonary veins and dump in to the left atria. From there, blood travels through the mitral valve into the Left ventricle before it is ejected through the aortic valve into the body via the aorta. Systemic Circulation: From the aorta, blood splits into the common carotid arteries and descending aorta. The Right brachiocephalic
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  • Fall '17
  • Anatomy, Betts, Pulmonary valve, Cardiac Conduction System

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