The Heart Of The Body Essay

Both the right and left atrium contract causing blood to flow though the two valves, and then into the left ventricle. The left ventricle pumps blood into the systemic circulation through the aorta. This systemic circulation system is much bigger than the pulmonary circulation system, which is why the left ventricle is so big. The blood on the left side of the heart is oxygenated. It becomes oxygenated when the deoxygenated blood passes through the right atrium and then flows into the left ventricle. It is then pumped along the pulmonary artery into the lungs where it is oxygenated. It then travels through the pulmonary veins back into the heart. It enters through the left atrium and then travels to the left ventricle. This process is repeated over and over again, to make blood continuously flow through the heart, lungs and body. This process ensures that there is always enough oxygen for the body to work

Now, let's talk how the heart works. The heart is divided into two halfs. Each side has a upper and a lower chamber. The upper right chamber revives poor-oxygen blood from the body. The lower right chamber pumps

Today, one of the leading problems discussed in politics is healthcare. America constantly struggles with their healthcare system to make it affordable and accessible to communities. In the twentieth century this same problem also existed, creating one of the most well-known African American activist groups in America. In the book Body and Soul by Alondra Nelson, it discusses the social inequalities of the healthcare system in America and how the Black Panther Party fought against medical discrimination for African Americans. Nelson talks about how the Black Panther Party went from the role of protecting black citizens to a larger political role in African American health care. The significance of this book applies to medical sociology in many ways and is essential to the understanding of providing better healthcare to future generations. In the following book review, it includes a summary of each chapter to highlight the main points, some of the very many medical sociology concepts that could be applied, and lastly an evaluation of the book as a whole and its significance to our course.

In a normal human being the heart correctly functions by the blood first entering through the right atrium from the superior and inferior vena cava. This blood flow continues through the right atrioventricular valve into the right ventricle. The right ventricle contracts forcing the pulmonary valve to open leading blood flow through the pulmonary valve and into the pulmonary trunk. Blood is then distributed from the right and left pulmonary arteries to the lungs, where carbon dioxide is unloaded and oxygen is loaded into the blood. The blood is returned from the lungs to the left

Oxygen and nutrients the body requires for function are pumped around this complex network of blood vessels by the heart. At roughly the size of a human fist, the heart is a four-chambered muscle and performs two functions of circulation simultaneously and continuously. Systemic and pulmonary circulation. The heart is made up from three separate layers of cardiac tissue; the outer layer called the pericardium, which is a double sac-like outer covering with serous fluid inside to keep the middle layer, the myocardium from adhering to the outer layer. This middle layer of the heart is the heart muscle which is thicker on the left side, to aid with the pressure needed to sustain systemic circulation. The inner layer of the heart is the endocardium. It’s lining is smooth to help prevent the blood which circulates around the inside of the heart from clotting. The heart is the human body’s in-built pacemaker, and the electrical signals sent through the it cause the heart to contract and relax. This process is triggered by the autonomic nervous system and the contraction and relaxing cycle is

The natural “pacemaker” of the heart is the initiating electrical conductor to start each heartbeat which is identified as the sinoatrial node located in the right atrium of the heart and signals for atrial contraction (Levine & Miller, 2008). The electricity travels then to the atrioventricular node that signals for ventricular contraction. The Bundle of His receives this signal and the electrical impulse is split down the septum of the heart to each ventricle. The impulse then terminates in the purkinje fibers following contraction of the ventricles (http://www.emedicine.medscape.com/article/1922987-overview#a4). This process is repeated with every

In the normal conduction of the heart the electrical impulse starts in the SA node, also called the pacemaker of the heart. The electrical impulse travels through the right atrium and through the Bachmann’s bundle into the left atrium. This stimulates the atria to contract. Next the signal travel to the AV node. The AV node slightly delays the signal. This delay is needed for the heart to beat properly. Without this delay the atria and ventricles would beat at the same time. The electrical signal then travels to the Bundle of His where it is split into the signals going to the right and left ventricle. The signal

This node produces electrical impulses that spread across the surface of each chamber, causing them to contract. The signals begin by spreading through the atria. As the atria contract, the blood within is forced through the corresponding valves into the ventricles.

The heart is controlled by an electrical system of the heart. This electrical system (Figure 1.1) of the heart includes several functions which hold the contraction of the heart muscles. The SA node starts the heartbeat by contracting the upper two chambers of the heart known as atria. This electrical impulse travels through bundle bunches and Purkinje fibers. This pathway of electrical impulse contracts the lower chamber of the heart called as ventricles. From

A healthy heart pumps blood continuously through the circlutory system. It’s normal size is a little larger than a fist. The heart has four chambers, two on the right and two on the left. The two upper chambers are called the atria and the lower two are known as the ventricles. The right atrium takes in deoxygenated blood from the rest of body and sends it back out to the lungs through the right ventricle where the blood becomes oxygenated. Oxygenated blood travels from the lungs to the left atrium, then onto the left ventricle, which pumps it to the rest of the body.

The heart beats when all the chambers of the heart squeeze (contract). The process starts when blood collects in the upper chambers of the heart. Once the chambers are full, a group of cells called the sinoatrial node sends out an electrical signal that makes the upper chambers contract. When the chambers contract, they push the blood through the tricuspid and mitral valves into the lower chambers of the heart. Once the lower chambers have filled with blood, an electrical signal causes these chambers to contract. This pushes blood through the pulmonary and aortic valves and out of the heart.

has to work harder pumping blood to the rest of the body. Blood in our

When body work is done on your vehicle after it has been in a collision, your vehicle will most likely also need to have paintwork done as well.

The heart is what keeps all living breathing species alive, animals or humans. If the heart was to shut down but the nervous system continued and was active, it would not matter. The entire body would shut down because once the supplier no longer delivers what is needed; organs will no longer function correctly, therefore causing irreversible damage. Arteries are what carried the rich oxygenated blood from the heart to the rest of the organs throughout the body. The Veins are what bring back the carbon dioxide blood to the heart. It then has to be put through a cycle so that it can be shipped back out. Blood travels from the right atrium through the tricuspid valve, to the right ventricle. From there, it is pumped to the lungs, the oxygen-rich blood goes to the left atrium and then through the mitral valve to the left ventricle where it goes to the aorta to be pumped around the body (Colombo 7). What looks to be a complicated process that would take hours or minutes is actually done in a matter a seconds.

Some would choose to declare that every human being is both a body and a mind. Both being gelled together until death, than having the mind go on to exist and the body being lifeless. A person lives throughout two collateral histories, one having to do with what happens to the body and in it, and the other being what happens in and to the mind. What happens to the body is public and what happens to the mind is private. The events which reply to the body consist of the physical world, and the events of the mind consist of the mental world.