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EXPLORATION AND DISSECTION OF A MAMMALIAN HEARTIn this experiment we obtained a fresh heart and dissected it to examine andobserve the different parts of the heart as well as studying how they function and workProblem How can we study the heart through dissectionThe most basic function of the circulatory system is to move the blood Theorgan that provides the force to push the blood through the vessels is the heart Themammalian heart is composed of four chambers to which large blood vessels areconnected The walls of these chambers are made of cardiac muscle tissue It is the contraction of these muscular walls in a synchronized manner that moves the bloodthrough this pump and its connected vessels Valves are present in several locationswhere they function to maintain a indirectional flow of bloodBy doing this experiment we will gain an understanding of the complexity of aheart by learning and doing how to probe the chambers and observe it carefully andinspecting the valves We will also learn about our own hearts because besides the size mammalian hearts are all very similarMaterials mammalian heart glass probe dissecting pan single-edged razor bladedissecting needle scalpel absorbent paper towelProcedure Results Refer to lab sheets1 Describe the function of each of the four heart chambers Blood first enters the right atrium while the atria are relaxing This blood iscoming back from the body tissues The blood that is returning from the lungs entersthe left atrium The atria contracts and causes the ventricles to fill with blood Thiscontracts also and makes the blood flow out of the left ventricle into the aorta whileblood flows into the pulmonary artery from the right ventricle2 How are these chambers adapted for their specific functionsThe four heart chambers contract and relax because of the function of the cardiacmuscles This controls the blood flow in and out of the heart3 Why is the mammalian heart often described as two hearts that beat as oneThis is because the right
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