Pulmonary And Systemic Heart

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

The heart has four valves which each play an important role in healthy circulation. The four valves in order of circulation are tricuspid valve, pulmonary valve, mitral valve, and aortic valve. Each chamber of the heart has a valve that must fully open to allow blood to pass through to its next destination and close tightly when the blood is done passing, to prevent backflow.

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 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

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 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 has four main valves; tricuspid valve, pulmonary valve, mitral valve and aortic valve.

The heart is composed of four chambers or rooms. The top two chambers are called atriums, and these are the collecting chambers of the heart. The bottom two chambers are called ventricles, and these are the pumping chambers of the heart.

1. Heart is a hollow muscular organ located between the lungs in the mediastinum and pumps oxygenated blood to all parts of the body. Heart is present in the pericardial sac and has four chambers namely right atrium, right ventricle, left atrium and left ventricle and is separated into left and right side by a muscular wall called septum. Interatrial septum separates the two atria and interventricular septum separates two ventricles. The heart wall has three layers epicardium, myocardium and endocardium. Two large veins such as superior vena cava and inferior vena cava open in right atrium. Atria are superior, and ventricles are located inferiorly. Two atrioventricular valves namely tricuspid valve and mitral valve(bicuspid) and two semilunar

As the name implies, cardiac muscle tissue is only found in the heart. It pumps blood through the heart’s chambers and into the blood vessels.

The heart is basically a pump that has to circulate the blood around the body delivering oxygenated blood to our organs and then returning deoxygenated blood to our lungs. There are four chambers in the heart, two atria and two ventricles. There are four main valves, mitral, aortic, tricuspid and pulmonary7b.

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.

The human heart is kept well protected by a sac and fluid that cushions it. The sac that the heart is housed in is called the pericardium. Inside the walls of this sac is pericardial fluid, and this fluid is responsible for cushioning the heart. There are three layers that the walls of the human heart are made up of. The wall that is closest to the heart is called the endocardium, and this is the portion that is in contact with the blood. The middle wall is called

The basic anatomy of the heart is that the heart has four chambers, two atria and two ventricles. While that is common knowledge, the heart is much more complicated than that. The heart is encased in a fluid-filled cavity known as the pericardial cavity. The pericardial cavity walls and lining are made of pericardium. “Pericardium is a type of serous membrane that produces serous fluid to lubricate

Heart= The heart is around the size of a persons fist, it is composed of 2 sides and four chambers, the left and right atria and the left and right ventricles. The atria’s are at the top of the heart, they receive blood from various parts of the body. The two ventricles are located on the bottom of the heart and pump blood away from the heart. The right ventricles responsibility is to pump the deoxygenated blood to the lungs, while the left ventricle pumps the oxygenated blood to the rest of the body. Between the chambers there are valves in the heart, the valves control the flow of blood, making sure it flows in one direction.