Cardiovascular System And Heart Anatomy

Inside the heart the four chambers were clearly defined and hollow. The wall on the left side of the heart was much thicker and firmer than the wall on the right side. The wall on the right side was very thin. The valves appeared stringy, stretchy and very long.

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

R E V I E W S H E E T 30 Anatomy of the Heart

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

Why is the wall of the left ventricle thicker than the wall of the right ventricle?

The right and left side of the heart are similar in structural components. Both sides contain a AV valve, semilunar outflow valve and smooth and muscular parts. The main difference between the two sides is size. The muscle of the left ventricles is thicker than the right side. The cavities are the same size and pump the same amount of blood. The left ventricle pumps with more power to profuse the entire body. The right ventricle profuse the lungs. The systemic resistance of the left ventricle is much higher than the pulmonary flow. The right

This article will explore your heart's anatomy. We'll describe its exterior, including the arteries and veins that supply blood to the muscle. We'll also describe the organ's interior, including the chambers, valves, and blood flow. Lastly, you'll learn how its electrical system helps ensure its proper function.

The cardiovascular system - The cardiovascular system is responsible for transporting nutrients and removing gaseous waste from the body. It consists of the heart, which powers the whole process, the veins, arteries, and capillaries, which deliver oxygen to tissue at the cellular level. The cardiovascular system carries blood that is low in oxygen away from the heart to the lungs via arteries, where oxygen levels are restored through the air once oxygenated, this blood is then carried throughout the body via arteries, keeping our organs and tissue alive. The cardiovascular system is the workhorse of the body, continuously moving to push blood to the cells. If this important system ceases its work, the body dies.

The right and left sides of your heart are divided by an internal wall of tissue called the septum. The area of the septum that divides the atria (the two upper chambers of your heart) is called the atrial or interatrial septum.

Three different layers work together to form the heart. These are the pericardium, myocardium, and endocardium. The outermost layer is the pericardium, and it is formed of and additional two layers. In the middle

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)

The cardiovascular system, the workhorse of the body, has long been an object of fascination by civilizations. How does such a tiny muscle support the life of a human for such a long period of time? The answer lies within the physiology of the cardiovascular system itself. Simple one-celled organisms had one major problem when it came to the diffusion of oxygen, the oxygen required by a mammal for instance, would be much greater than the rate at which these cells could diffuse oxygen. Thus the need for a more efficient process was integral in the creation of cardiovascular system as we know it today. The ability of the heart to pump blood fast enough (and in continuous loops) allows for this absorption of vital nutrients in a prompt manner. However the common knowledge we have currently about the way this system works is a relatively new understanding. In the 17th century, an Italian anatomist named Marcello Malpighi observed the capillary exchange between interstitial fluid and blood. This idea was a radical one (p.463-464). Common belief at the time was that the cardiovascular system distributed both blood and air. Many had thought that blood was produced in the liver and was distributed through the veins and also believed that it was the arteries that distributed oxygen to the body. William Harvey disproved this belief when he discovered that that weight of blood pumped by the heart in one hour exceeds the weight of the entire body. He soon discovered the one-way loop in

The heart is a muscular organ, which controls the movement of the blood in the cardiovascular system. The heart has two sides which are the pulmonary circulation which transports deoxygenated blood from the right side of the heart to the lungs, where the blood picks up oxygen and returns to the left side of the heart. The other side of the heart is called the systemic circulation which

The heart is divided in half by the septum and has four chambers; right and left atria’s and the right and left ventricles. The heart also has four values to ensure the blood flows throughout the chambers properly these are called the; tricuspid valve, mitral valve, pulmonary valve and the aortic valve. All of those are surrounded by the thick wall of the heart with three layers. The endocardium is the inner smooth layer surrounding each chamber. The myocardium is the thick muscular middle layer, the muscular wall of this layer allows the heart to contract and pump the blood. The epicardium layer is the outer layer of the heart.