The Heart Essay

The heart has two sides, separated by an inner wall called the septum. The right side of the heart pumps blood to the lungs to pick up oxygen. The left side of the heart receives the oxygen-rich blood from the lungs and pumps it to the body. The heart has four chambers and four valves and is connected to various blood vessels. Veins are blood vessels that carry blood from the body to the heart. Arteries are blood vessels that carry blood away from the heart to the body.

Located between the parietal and visceral layer is the pericardial fluid, this is emissions of pericardial cells that helps reduce friction between layers as the heart moves and thumps. The heart has three layers; the epicardium (made up of two tissue layers the visceral layer and serous pericardium layer). This layer of the heart is made out of mesothelium which is a thin transparent layer that is a delicate fibroblastic tissue and adipose tissue. This adipose tissue starts to get thickest over ventricular surfaces where the hearts coronary and cardiac vessels are found. The center layer of the heart is the myocardium (this layer is in charge of the pumping activity of the heart and is made out of cardiovascular muscle). The myocardium consists of ninety-five percent of the hearts wall, which consists of muscle fibers. The cells in the myocardium layer are muscle strands. The cardiovascular muscle fibers structure bundles and whirl slantingly around the heart which is in charge of the heart 's pumping activity. The internal layer of the heart is the endocardium (this is a flimsy layer of endothelium tissue overlying a thin layer of connective tissue). This layer gives a smooth coating layer to the chamber of the heart and spreads the valves of the heart. This smooth layer lessens friction as blood moves all through the heart. The endothelium and endocardium have large veins that connect to the heart. The heart is four chambers; two

The hearts function as a double pump that serves two circulations. The pulmonary pump in the right side of heart is provided for the gas exchange in the body, and the systemic circulation in the left side provides the functional blood supply to all body tissues. The functional blood to the heart is provided by the coronary arteries. Right coronary artery supplies the heart through the posterior interventricular and marginal artery branches; and the left coronary artery supplies the heart via anterior interventricular artery and the circumflex artery. The myocardium is drained by great, small, and middle cardiac veins which

In this lab, the students observed the rate and rhythm and how it fluctuates when an individual is relaxed, in a seated position, and after exercising. The Heart is a hollow muscular organ that is cone shaped and it is located in the mediastinum in between the lungs (The Heart, Slide 3 2016). The heart is separated into two main divisions, the pulmonary circuit and the systemic circuit. The pulmonary circuit helps carry blood to the lungs from the heart for gas exchange and it is located in the right side of the heart. In the pulmonary circuit the heart fills with blood in the right atrium then it passes through the right atrioventricular valve which then leads to the right ventricle. Once it is in the right ventricle, the right ventricle contracts which opens the pulmonary valves. After this blood flows from the pulmonary valve to the pulmonary trunk which then distributes it into the right and left pulmonary arteries that supply the lungs where it deposits oxygenated blood.

The right ventricle pumping blood to the lungs, and the left ventricle pumping blood to the body.

The cardiovascular system uses blood to transport oxygen, nutrients, and other materials throughout the body. The heart is made of cardiac muscle and is composed of 4 distinct chambers. The right side of your heart collects blood on its return from the rest of our body. The blood entering the right side of your heart is low in oxygen. Your heart pumps the blood from the right side of your heart to your lungs so it can receive more oxygen. Once it has received oxygen, the blood returns directly to the left side of your heart, which then pumps it out again to all parts of your body through arteries (the aorta).

The heart is a very strong muscle that has one major job. The heart’s job is to pump blood throughout the entire body. The heart is made up of 4 chambers, and 4 valves. There is the right and left atrium, and a right and left ventricle. The atriums are the superior chambers, and the ventricles are inferior chambers. The left ventricle is the most important, because that is where the blood travels through to go to the aorta, and eventually the rest of the body (Taylor 2015).

The heart is one of the strongest muscles in the body. According to Henry Gray's “Anatomy of the Human Body” (2015), the heart is roughly the size of a large fist and weighs between about 10 to 12 ounces (280 to 340 grams) in men and 8 to 10 ounces (230 to 280 grams) in women (Lewis, 2015). The human heart has four chambers: two upper chambers (the atria) and two lower ones (the ventricles). The heart's outer wall consists of three layers; epicardium (outermost wall), myocardium (middle wall), endocardium (inner layer). The tricuspid valve and the mitral valve make up the atrioventricular (AV) valves, which connect the atria and the ventricles (Lewis, 2015). The function of the heart is divided into two pathways: the pulmonary circuit and the systemic circuit. In the pulmonary circuit, deoxygenated blood travels to the lungs by way of the pulmonary artery, then returns as oxygenated blood to the left atrium of the heart via the pulmonary vein. The systemic circuit, delivers oxygenated blood to the body from the left ventricle to the aorta, and from there enters the arteries and capillaries where it supplies the body's tissues with oxygen. Then, deoxygenated blood returns through the veins to the venae cavae, re-entering the heart's right atrium to restart the

The heart is located in the mediastinum, about two-thirds from the body midline. Three layers form the heart. From the inside out: endocardium, myocardium and epicardium. The myocardium, the thickest of all, is formed by striated muscle to provide the heart with the contractibility necessary to pump the blood into the vasculature. (Martini, Nath, & Bartholomew, 2008)

Based on the external observation, the left side of the heart appeared bigger than the right side. When looking at the heart internally, the right ventricle pumps the blood to the lungs, and the left ventricle to the rest of the body. Therefore the left ventricle needs to be stronger and bigger, than the right ventricle, as it has a larger role in the functioning the heart.

All of the four heart areas have an important blood vessel that goes in or out. The arteries go out of the ventricles and the veins go in the atria.

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 is the muscular pump that pumps blood around the body and to all the major body parts. The heart is located just to the left of your sternum. The left ventricle pumps blood through the aorta to the systemic circulation while the right ventricle pumps blood towards the lungs and rest of the body. Blood enters the heart through both of the atriums, blood goes into the right atrium via the inferior and the superior vena cava. The right side pumps deoxygenated blood in the veins in the

While the bulk of the heart is myocardium, there are structural components that are pertinent. The four cardiac valves can be seen in a transverse section of the heart at the base of the ventricles.

The heart is a muscular organ that pumps blood to and from all areas of your body with the help of veins, capillaries and arteries. It has four chambers containing two atria and ventricles. The atriums receive blood from the veins and the ventricles pump blood into the arteries.it also has inlet and outlet valves that ensure blood flows in the right direction. The heart wall is made up of 3 layers- the epicardium, the myocardium and the endocardium.