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Dissection OF THE Pigs Heart and soul Physical Education Essay

For most mammals, the center is an extremely important organ in their bodies. Performing as a pump, the heart and soul can control the blood by alternating the contractions of muscles and their relaxations. Because of this pumping action, the blood vessels can be retained moving throughout the bodies.

Like other mammals, the pig's heart has a intricate structure. The heart and soul comprises of three tiers, the epicardium, mycardium and endocardium (Pathguy, 2005). It is also divided into four main chambers. They will be the right atrium and right ventricle, the left atrium as well as the left ventricle (Lane, 2010b). On both factors, top of the chambers are known as the atria, and the ventricles are lower. Because the left ventricle must pump the oxygenated blood throughout the body, it offers thicker muscle. The remaining ventricle wall membrane is thicker than other chambers' (Lane, 2010b). It is three times the thickness of the right ventricle˜ Skillstat, 2005˜. The proper and left edges of the heart and soul are separated by a muscle called septum. The septum is made up of two areas; the interatrial septum and the interventrial septum (Buddyproject, 2000).

In the heart and soul, there are always a series of valves used to regulate the blood circulation path. On each area, a particular valve separates the atrium and the ventricle. The valve between your right atrium and the right ventricle is called the tricuspid valve. This valve allows blood to enter into the right ventricle from the right atrium. And it can also prevent the backflow of blood vessels (Lane, 2010b). Having similar functions, the valve on the kept area is the bicuspid valve (Street, 2010a).

Double circulation in mammal contains the pulmonary circuit and the systemic circuit (Pickering, 2000). These two circuits are separated. Deoxygenated blood vessels from the body can be received and pumped to the lungs by the right side of the heart and soul (Losos, Mason & Vocalist, 2008). This is actually the pulmonary circuit. The systemic routine is usually that the left side of the heart carries oxygenated blood and pumps it to the tissues and organs. This double blood flow is also achieved by the arteries and veins in the heart (Losos, Mason &Vocalist, 2008). The superior vena cava and the inferior vena cava can go back deoxygenated bloodstream from the cells to the right atrium. To oxygenate the blood vessels, pulmonary artery can deliver the deoxygenated bloodstream from the right ventricle to the lungs˜ NHLBI, nd). Oxygenated bloodstream can type in the still left atrium via the pulmonary veins. Aorta is main vessel. It can take oxygenated blood to the body from the still left ventricle˜used by the systemic flow (NHLBI, nd).

The equipment in the test included a fresh pig heart, box, a dissecting pan, forceps and a scalpel, as well as several pairs of gloves.

Procedures of evaluating the external framework (Lane, 2010a)

1. A heart was washed and positioned in a dissecting skillet.

a. The center appeared sanguineous colour. Its size was just a little larger than individual fist. Inside the upper part, there were some substances showing cream colour.

2. Using the forceps, part of the pericardium was removed.

The pericardium membrane covering the heart was skinny and hard to be removed.

3. The heart and soul was turned so the entrance or ventral side was facing the observers. Four chambers were located.

c. In Physique 1, the half including the apex was the left side of the heart. A groove was on leading of the center and divided the heart and soul into two attributes. The coronary artery are available in the groove. The positions of four chambers, the aorta and the pulmonary artery were located. There have been era-shaped extensions (tagged 1 & 2) on both factors.

4. The heart and soul was transformed over. Other main arteries, like the pulmonary veins, the superior vena cava and the inferior vena cava were located.

d. As Figure 2 shows, pulmonary veins were inferior compared to the pulmonary artery. Two vessels becoming a member of together were located as the superior vena cava and the inferior vena cava.

Procedures of evaluating the inner anatomy (Lane, 2010a)

1. The heart was cut profound enough to go through the medial side of the pulmonary artery before wall membrane of the right ventricle.

2. Dried blood inside the chambers was rinsed out the center.

3. The right atrium was located.

4. Other main set ups in the right area, including the inferior vena cava, the superior vena cave and the tricuspid valve were located.

a. As Number 3 shows, the very best of chamber was the right atrium. The tricuspid valve separated the right atrium and right ventricle. The muscle on the right part is located as septum.

5. The heart was cut regularly from the exterior of the left atrium downward into the still left ventricle.

b. With a thicker wall, it was harder to lower privately.

6. The heart was pushed open. Dried blood vessels was rinsed out with drinking water.

7. Main set ups on the kept side, including the bicuspid valve and the still left ventricle were examined.

8. The heart was cut across the left ventricle toward the aorta and then slice to expose the valve.

9. The three flaps or leaflets on the tricuspid valve were counted and noticed.

C. The bicuspid valve was thick. The aortic valve was between your kept ventricle and the aorta (see Physique 4). It had three flaps and a half-moon shape.


Figure 1 shows the exterior framework (anterior view) of the center.

Figure 2 shows the exterior structure (posterior view) of the center.

Figure 3 shows the inner composition of the right side in the heart and soul.

Figure 4 shows the internal framework of the left aspect in the center.

All these diagrams are fastened at the end of this survey. Some functions of the tagged constructions are also observed on the right edges of these diagrams.


The center in a dissecting skillet can be thought that the center is in the body of your person facing the observers. The kept area of the heart is on the right part of the dissecting. This makes the observers much easier to be baffled when examining the heart's structures.

Those cream substances in the top part of the heart and soul can be deduced as extra fat throughout the muscle pump. The remaining area of the heart and soul has more muscular and firmer than the right one. This gives the left side with enough energy to pump blood to the complete body.

It is hard to identify the positions of the inferior and superior vena cava accurately. The superior vena cava returns blood to the right atrium from the upper part of tissues, while the inferior vena cava holds blood from the low cells (NHLBI, nd). Therefore, it is more reasonable that the inferior vena cava is below the superior vena cava rather than connecting to each other (As shown in Shape 2).

In this experiment, the semi-lunar getting into to the pulmonary veins has not been found. The ear-shaped extensions (tagged 1&2 in Amount 1) may not participate in the composition of the heart. But predicated on their positions, it's possible that they are the extensions of the right atrium and the left atrium.


The heart and soul is a pump muscle. It can pump oxygenated bloodstream and carry nutrition to the tissue throughout your body. A pig's center has four chambers, the left and right ventricle and the still left and right atrium. A series of main vessels are accountable for the pulmonary and systemic systems, such as the aorta, the pulmonary artery and pulmonary veins, as well as the inferior and superior vena cava. The vales between atria and ventricles act as barriers to prevent blood vessels backflow. Each simple framework of the heart and soul is contributed to providing blood vessels for the success of the cells in the bodies.

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