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Sheep Center Dissection Physical Education Essay

Like human being hearts, a sheep's heart has two atria and two ventricles. These four chambers work together to pump deoxygenated bloodstream to the lungs and oxygenated blood vessels to all of those other body; this enables blood to circulate the body in a normal manner. The key reason for carrying out this experiment is to examine and understand the structural top features of the heart which can only help us appreciate how the heart operates. It really is essential that location of both and external and interior vessels and chambers are obvious before any dissection takes place. It's important to note that when looking in the centre it's like considering a mirror representation, hence the right part of dissection is really the left side of the center and vice versa. Through the anterior view the location of most four chambers (two upper atria and two lover ventricles) should be known, the still left and right part of the center should be separated with a line of fat and vessels called the interventricular sulcus.

The heart and soul muscle, unlike the rest of the body's muscle, is unique to its function. It requires no energy (ATP ADP) in order to pump. Cardiac muscle gets the characteristic automaticity, what this means is that the center is under no impact of hormones of neurons for it to beat, the skin cells themselves have their own beating electricity. The heart's cells are part of something known as the heart's doing system. Special skin cells within the center (part of the SA and AV nodes) are accountable for the heart beat, however if circumstances in the torso change and the center is required to pump more or less blood to your body then the autonomic nervous system plays a role via special nerves called the sympathetic and parasympathetic nerves.

The center circulates blood vessels around your body, it is nothing but two pumps joined in one organ.

The left ventricular wall (left myocardium) is thinker than that of the right ventricular wall membrane (right myocardium), this is because of the reason why that the right part of the heart and soul only pumps bloodstream (deoxygenated) to the lungs, whereas the kept side pumps blood vessels (oxygenated) to the complete body.

Materials and methods:

Preserved sheep heart

Dissecting pan

Surgical scalpel

Surgical scissors

Dissection:

The aim is to obtain a frontal section through the remaining and right aspect of the heart. During the dissection I needed to be very cautious never to cut any valves of vessels that would lead to negative results.

I first located the interventricular sulcus; following that I identified the right ventricle and the remaining ventricle. The proper side of the center was left of the sulcus, after figuring out the superior vena cava I then made an incision using the scissors through the vena cava till the very best of the atrium. At this point using a scalpel would be easier, I therefore sustained the incision using the scalpel through the wall membrane of the right atrium right down to underneath of the right ventricle. The proper side is now put into two part, I pulled these two aside and immediately discovered the tricuspid valve that segregated the atrium from the ventricle. The existence of the tricuspid valve indicated and proved that the incision was made through the right aspect of the heart.

Moving on to the left aspect of the heart, I located the pulmonary artery and using the scalpel I made an incision through it right down to underneath of the kept ventricle. The semi-lunar valve of the pulmonary vein was present, as was the bicuspid valve that separates the still left atrium from the remaining ventricle.

My last 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.

Results:

Anterior (stern-costal) surface view

Vena cava

Pulmonary artery

Right atrium

Right ventricle

Interventricular sulcus

Pulmonary vein

Aorta

Left atrium

Left ventricle

Heart apex

The still left and the right attributes of the heart are divided by the line called the interventricular sulcus.

Right side of the center:

The picture on the right shows the tricuspid valve clearer than the main one below it.

Tricuspid valve

Tendons

Papillary muscles

Right ventricle

The below picture has been provided as the one above will not show All of the right side of the center.

Tendons

Wall of right ventricle (thinner than that of still left ventricle)

Vena cava

Right atrium

Tricuspid valve

Semi-lunar valve

From the picture above we can notify that the right ventricular wall membrane is thinner than the kept ventricular wall. The explanation for this is because of how the heart and soul works and exactly how it circulates blood vessels also to where (see benefits section on page 1). We are able to compare this picture to the one below, where in fact the left ventricular wall is actually thicker.

Left aspect of the heart:

Aorta

Pulmonary vein (slash)

Left atrium

Bicuspid valve

Tendons

Papillary muscles

Left ventricle (thick)

Superior view of heart:

Right atrium

Vena cava

Pulmonary vein

Cardiac skeleton

Aorta

Left atrium

Pulmonary artery

Conclusion:

The dissection was a relative success, all the chambers, vessels and valves were identified. After intense examination of the inside of the center, the center has two attributes, the right aspect of the heart and soul received deoxygenated blood vessels via the vena cava from the superior and second-rate sides of your body. This deoxygenated blood moves through the vena cava into the right atrium, down the tricuspid valve in to the right ventricle. If the ventricles contract the deoxygenated bloodstream in the right ventricle is pumped through the pulmonary artery transferring the semi-lunar valve. This deoxygenated blood vessels then moves to the capillaries of the lungs where they exchange waste products such as skin tightening and for air. The bloodstream is not oxygen-rich therefore oxygenated. The oxygenated bloodstream then journeys from the capillaries of the lungs to the pulmonary vein which contributes to the still left atrium of the heart, once the oxygenated bloodstream is in the remaining atrium it is forced (atrium systole) through the bicuspid valves into the left ventricle when it's then further pumped (ventricular systole) although aortic semi-lunar valves in to the aorta where it is distributed to the rest of the body where oxygen is necessary.

A lab and gloves was worn to avoid biological contamination, after the dissection the gloves were placed into biological throw away bins and hands were washed with antibacterial after removing the labcoats.

Evaluation:

More dissection practice would bring more accurate results, although I have dissected a sheep's center lots of times. Different sizes of hearts would have portrayed different sizes of valves and vessels; it could bring more attention to how the center evolves. As this practical involved sharing an individual sheep's heart between three students, room for problem was came across. Different slashes and incisions wished to be made, however the results arrived accurate.

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