Anatomical Structure Of The Heart

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 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 left side of the heart, has the left atrium and ventricle that takes in oxygenated blood from the lungs and pumps it out of the aorta.

In a normal heart blood would flow through the right atrium, to the right ventricle, to the lungs, back to the heart, into the left atrium, and into the left ventricle.

The human heart is a found within the chest cavity surrounded by the lungs. Roughly the size of a fist, the heart is a tenacious automated muscular unit that directs oxygenated blood through a sequence of four chambers. Inside these chambers there are four corresponding valves which permit blood to travel in the forward direction. On any given day the heart beats 100,000, and is capable of perfusing blood throughout the bodies’ 60,000 mile system of blood vessels (Christensen & Kockrow, 2011).

The heart is divided into four chambers. The top two chambers are the atria and the bottom two chambers are the ventricles. Two of the chambers, together make up the right heart and pump blood to your lungs, where it picks up oxygen. Blood that is carrying oxygen then travels to the two chambers on the left side of your heart, which then pumps the blood to the rest of your body. The ventricles (the bottom chambers) are powerful pumping chambers, which push the blood out of the heart when they contract. The smaller and less powerful top chambers of the heart (the atria), help to fill the ventricles with blood for the next contraction. The regulation and coordinated pumping action of the heart is provided by a network of electrical connections, which deliver electrical signals to the heart

This book was beautiful. I fangirled so hard while reading this that it should be illegal. The Anatomical Shape of a Heart is adorably quirky in all of the right ways. It will make you swoon, scream in anger, want to cry, and laugh your heart out. It was amazing – the perfect book to pull me out of my reading slump. This book has definitely made my top books of the year list – right up there with Six of Crows, Illuminae, and All the Rage – but for very different reasons.

The diagram above shows the external heart. It is shaped in a cone and is made up of the cardiac muscle. Its main function is to pump the blood around the body. There are three different layers. The outer layer is known as the epicardium, it is a thin membrane which helps to protect the outside of the heart. The middle layer is known as the myocardium where the cardiac muscle tissue is contained. Myocardium has the thickness and most mass in the heart, its responsibility is to pump the blood. Lastly, the inner layer is called endocardium, it is thin and a smooth. Its role is to keep the blood sticking of the heart.

The aim of this report is to provide an overview of chronic heart failure, examining signs symptoms and treatment related to the case study, medical history. The anatomy and physiology of the heart will be discussed, and the pathophysiology of chronic heart failure.

Anatomy is one of the oldest branches of medicine, with historical records dating back at least as far as the third century BC . Cardiac anatomy has been a continually explored topic throughout this time, and there are still publications on new facets of cardiac anatomy being researched and reported today. One of the fundamental tenets of the study of anatomy has been the description of the structure based on the universal orientation, otherwise termed the anatomic position (Fig. 2.1 ). The anatomic position depicts the subject facing the observer and is then divided into three orthogonal planes. Each plane divides the body or individual structure within the body (such as the heart) into two portions.

This visual is a very basic example of the anatomy of the heart. A nurse might have to create this visual to explain a diagnosis to a patient. Most patients do not know the anatomy of the heart of their functions. By drawing a simple visual, a nurse can explain the diagnosis to the patient, and show them how it is affecting their heart.

The valves of the heart are situated within the chambers of the heart and essential to the regulation of the blood that flows through the heart. The four valves are named as the tricuspid valve, the pulmonic or pulmonary valve, the mitral valve, the aortic valve. The blood flows from one chamber to the other by working in conjunction and acting as one way valves. When the heart contracts the valves open and close allowing the blood to control the flow. They valve’s functions are controlled by pressure differences generated within the heart a-long side with the help or certain cardiac

The heart is located in the thoracic cavity of the chest in the middle of the lungs and beneath the sternum. At the base, or top of the heart, is the aorta, pulmonary arteries, and superior vena cava. It forms a tip called the apex or the bottom and rests on top of the diaphragm and points to the left side of the body. The area around the heart is called the pericardia cavity. It is made up of a fluid filled area known as the pericardium, this protects the muscle from friction that could be obtained from the surrounding organs when it contracts. The heart wall has three layers; the epicardium, myocardium, and endocardium. The epicardium is the outer most layer known as the visceral layer of the pericardium. Beneath the epicardium is the myocardium. The myocardium is the thick muscular layer that contains cardiac muscle tissue, which causes the heart to pump. The inside of the heart is the endocardium. It is an endothelium layer that causes the inside of the heart to be smooth to prevent blood from sticking to the walls of

6. Automaticity – ability of heart to beat spontaneously and repetitively without external neurohormonal control. The heart is capable of beating outside the body, given proper laboratory conditions. Automaticity is evidently linked to fluid and electrolyte balance rather than to nervous system control.