Name: Block: Date: Biology 12: Heart Dissection Let’s watch the following heart tutorial: http://www.zerobio.com/videos/sheep_heart_anatomy.html 1) Lay the heart down on the dissecting tray. Orient yourself with the heart by identifying the aorta at the top and the apex at the bottom, as well as the right and left sides. The right ventricle can be identified by squeezing the heart, since the myocardium on the right side is much less rigid than that of the left ventricle. The coronary artery will be visible running diagonally along the heart, separating the smaller right side from the larger left side. Identify the auricles… the external portion of the atria. 2) With your scalpel, make a cross-sectional incision that will split each chamber. Separate the two halves of the heart for examination. (Note: Steps 1 and 2 combine for 2 technique) 1 3) Identify the following structures with the corresponding coloured pin: Heart Structure Pin Colour Right Atrium Right Ventricle Right AV Valve Right SL Valve Septum Left Atrium Left Ventricle Left AV Valve Left SL Valve Chordae Tendineae #1 #2 #3 Clear White Black Blue Green Yellow Red 4) Identify, with a probe, the following blood vessels: Blood Vessel Aorta Anterior Vena Cava Posterior Vena Cava Pulmonary Arteries Pulmonary Veins Coronary Arteries/Veins 5) Explain (and show) the path of blood through the heart. Heart Dissection Performance-Based Assessment: Technique Identification of structures with pins Identification of structures with probe Explanation of circulation of blood through heart Beginning Only some of the incisions are precise. Only some of the structures are correctly identified. Only some of the structures are correctly identified. Only some of the circulation of blood is correctly explained. Developing Most incisions are precise. Correctly identified most of the structures. Correctly identified most of the structures. Correctly explains most of the circulation of blood through the heart. Accomplished Almost all incisions are precise. Correctly identified almost all of the structures. Correctly identified almost all of the structures. Correctly explains almost all of the circulation of blood through the heart. Exemplary Proper precise incisions. Correctly identified all of the structures. Correctly identified all of the structures. Correctly explains all of the circulation of blood through the heart. 2