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Heart Dissection Dissection Directions: 1) Identify the front and back of the heart and which is the right and left side 2) Identify the 4 chambers (R/L atrium and R/L ventricle) Remember, atria are smaller than expected, the darker colored sacs on top of the heart 3) Trace the flow of blood starting with the deoxygenated blood that would enter the right atrium (Superior/Inferior vena cavas are often cut off, but sometimes you can see the holes where they would have attached to the right atrium) and ending with oxygenated blood leaving the aorta. Use your fingers to figure out where certain vessels lead to 4) As you trace the flow of blood, identify all of the structures listed in the chart below. 5) Give everyone in your group a chance to practice the flow of blood. Help each other out. 6) When you are ready, call me over and I will quiz you on the different parts (from the chart). One person will explain the entire flow of blood through the heart but each person needs to be ready to answer a question, it's a group effort to help each other learn. 7) Once I’ve given you the ok, you can put the heart back in the plastic bag, wash the plate at your lab sink, and wash your hands. Structures to know Part Adipose Tissue Aorta Aortic Valve Bicuspid Valve (Mitral Valve) Chordae Tendinae Interventricular Septum Left Atrium Left Ventricle Pulmonary Artery Pulmonary Valve Pulmonary Vein Right Atrium Right Ventricle Superior/Inferior Vena Cava Tricuspid Valve Right atrium Function Fat surrounding the heart Carries blood from the left ventricle to the rest of the body (not lungs) Allows blood to leave left ventricle and enter aorta Keeps blood in left ventricle from flowing back into left atrium Tendons that connect the bicuspid and tricuspid valves to muscles Separates right and left ventricles Upper left chamber that receives blood from pulmonary veins Receives blood from left atrium and contracts to force blood into aorta Carries blood from right ventricle to the lungs Allows blood to leave right ventricle and enter pulmonary artery Carries oxygenated blood from lungs to left atrium Upper right chamber that receives blood from the vena cava Receives blood from right atrium and pumps it to pulmonary artery Drains blood from upper and lower body into right atrium Keeps blood in right ventricle from flowing back into right atrium Left atrium Aorta Bicuspid Valve Cordae Tendenae Left Ventricle Right Ventricle Interventricular Septum
