Sheep Heart Dissection Physical Education Essay

Sheep centre and soul Dissection Physical Education EssayLike human essences, a sheeps rawness contains two atria and two ventricles. These intravenous feeding chambers work together to nerve deoxygenated declination to the lungs and oxygenated blood to the rest of the organic structure this allows blood to circulate the body in a regular manner. The important agreement for carrying out this experiment is to examine and understand the structural features of the soft summationedness which will help us appreciate how the shopping centre operates. It is vital that location of both and exterior and intimate vessels and chambers are clear before any dissection takes place. It is important to credit decline that when looking at the core group its like looking at a mirror reflection, hence the business case of dissection is actually the left wing expression of the heart and vice versa. From the anterior view the location of all four chambers (two upper atria and two lov er ventricles) should be noted, the left and compensate positioning of the heart should be separated by a line of fat and vessels called the interventricular sulcus.The heart muscle, unlike the rest of the bodys muscle, is unique to its function. It requires no nil (ATP ADP) in order to pump. Cardiac muscle has the characteristic automaticity, what this means is that the heart is under no influence of hormones of neurons for it to beat, the cells themselves have their own beating power. The police wagon cells are part of a system known as the wagon conducting system. Special cells within the heart (part of the SA and AV nodes) are responsible for the heart beat, however if circumstances in the body change and the heart is indispensable to pump more or less blood to the body past the autonomic nervous system plays a role via special nervousness called the sympathetic and parasympathetic nerves.The heart circulates blood around the body, it is nothing precisely two pumps join ed in a single organ.The left ventricular wall (left myocardium) is thinker than that of the right ventricular wall (right myocardium), this is due to the reason that the right side of the heart only pumps blood (deoxygenated) to the lungs, whereas the left side pumps blood (oxygenated) to the entire body.Materials and methodsPreserved sheep heartDissecting pan surgical scalpelSurgical scissors holdDissectionThe aim is to obtain a frontal section by the left and right side of the heart. During the dissection I had to be very vigilant not to cut any valves of vessels that would result in negative results.I first located the interventricular sulcus from there I identified the right ventricle and the left ventricle. The right side of the heart was to the left of the sulcus, after identifying the prize vena cava I then made an incision victimization the scissors through and through the vena cava till the top of the atrium. At this point victimisation a scalpel would be easier, I therefore continued the incision employ the scalpel through the wall of the right atrium down to the bottom of the right ventricle. The right side is now split into two part, I pulled these two apart(predicate) and immediately identified the tricuspid valve that separated the atrium from the ventricle. The presence of the tricuspid valve indicated and corroborate that the incision was made through the right side of the heart.Moving on to the left side of the heart, I located the pneumonic arterial blood vessel and using the scalpel I made an incision through it down to the bottom of the left ventricle. The semi-lunar valve of the pulmonary vein was present, as was the bicuspid valve that separates the left atrium from the left ventricle.My terminal incision was made through the aorta this incision was done to observe the aortic semi-lunar valve.Several pictures were taken for the results section.ResultsAnterior (stern-costal) surface view mineral vein cavapulmonary arteryRight atriumRight ventricleInterventricular sulcusPulmonary veinAortaleft field atrium go forth ventricleHeart apexThe left and the right sides of the heart are divided by a line called the interventricular sulcus.Right side of the heartThe picture on the right shows the tricuspid valve clearer than the one on a lower floor it. angular valveTendonspapillary musclesRight ventricleThe below picture has been provided as the one above does not show ALL the right side of the heart.TendonsWall of right ventricle (thinner than that of left ventricle)Vena cavaRight atriumTricuspid valveSemi-lunar valveFrom the picture above we can tell that the right ventricular wall is thinner than the left ventricular wall. The reason for this is due to how the heart kit and caboodle and how it circulates blood and to where (see introduction section on page 1). We can equation this picture to the one below, where the left ventricular wall is obviously thicker.Left side of the heartAortaPulmonary vein (cut)Le ft atriumBicuspid valveTendonsPapillary musclesLeft ventricle (thick)Superior view of heartRight atriumVena cavaPulmonary veinCardiac skeletonAortaLeft atriumPulmonary arteryConclusionThe dissection was a relative success, all the chambers, vessels and valves were identified. After intense outline of the interior of the heart , the heart has two sides, the right side of the heart received deoxygenated blood via the vena cava from the superior and inferior sides of the body. This deoxygenated blood travels through the vena cava into the right atrium, down the tricuspid valve into the right ventricle. When the ventricles contract the deoxygenated blood in the right ventricle is pumped through the pulmonary artery passing the semi-lunar valve. This deoxygenated blood then travels to the capillaries of the lungs where they exchange waste products such as carbon dioxide for oxygen. The blood is not oxygen-rich therefore oxygenated. The oxygenated blood then travels from the capillaries of the lungs to the pulmonary vein which leads to the left atrium of the heart, once the oxygenated blood is in the left atrium it is pushed (atrium systole) through the bicuspid valves into the left ventricle when it is then further pumped (ventricular systole) though the aortic semi-lunar valves into the aorta where it is distributed to the rest of the body where oxygen is required.A lab and gloves was dim to prevent biological contamination, after the dissection the gloves were put into biological waste bins and hand were washed with antibacterial after taking off the labcoats.Evaluation much dissection practice would bring more accurate results, although I have cut a sheeps heart more than a few times. Different sizes of hearts would have portrayed the different sizes of valves and vessels it would bring more attention to how the heart evolves. As this practical involved sharing a single sheeps heart between three students, room for error was encountered. Different cuts and i ncisions wanted to be made, however the results came out accurate.