The Heart Summary : The Anatomy Of The Heart

The cardiovascular system, however, would not be able to effectively complete these functions without help from what is sometimes referred to as the body’s hardest-working organ- the heart. Approximately the size of a fist, the heart is contains four chambers (the uppermost are called the atria and the lowermost are called the ventricles) and four valves. Additionally, the heart is surrounded by the pericardium, a structure that serves to protect the heart, keep the heart stabilized in the chest, and

The heart is located between lungs and it is protected by the rib cage, it is thought to be the same size as a closed fist. The heart is protected a membrane called pericardium, this membrane contains a film of fluid which helps prevent fiction. Each side of the heart consist of an atrium and a ventricle. The right side of the

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

The heart, blood and blood vessels make up the basis of the cardiovascular system also known as the circulatory system. The average human body contains approximately 5 litres of blood which is carried around the body via a network of blood vessels split into three types; arteries, veins and capillaries. The arteries are the largest of the three vessels and carry blood away from the heart. Veins carry blood to the heart and are smaller than arteries, then finally the smallest vessels known as capillaries distribute the oxygen rich blood to organs whilst simultaneously picking up the waste carbon dioxide and water from the organs to transport back to the heart where it can be pumped into the lungs to be exhaled.

Explanation: A). Blood carries oxygen from the lungs to the cells of organs and tissues and carbon dioxide from those organs and tissues to the lungs inside our body.

The right atrium is where the process begins. Then, blood travels through the tricuspid valve to the right ventricle, and from there to the pulmonary artery. Once the blood travels through the pulmonary artery, it reaches the lungs. While in the lungs, the blood goes through a gas exchange: deoxygenated blood gets oxygenated (The gas exchange takes place in the alveoli, which are tiny air sacs in the bottom of the lungs

The arteries carry the blood away from the heart they have thick walls due to high blood pressure and the walls begin to get narrower as they have left the heart, this also increases pressure of the blood. This means the blood carrying the oxygen and glucose will flow around the body quickly and efficiently. The walls of the arteries are made of smooth muscle and lines with thin, smooth epithelial tissue

Arteries: Carry blood away from the heart and supplies blood to the tissues of the body. There are several types.

Chapter twenty is the last one of the circulatory system and it discussed about the blood vessels and circulation. Blood vessels is the distribution network or the network of tubes. There are three main blood vessels in the heart there are artery, veins and lymphatic. The arteries are all the blood vessels that take blood out from the heart. It tends to be thick, strong and tough because all the blood is rushing through the arteries. The arterioles are like the mini arteries that branch off of the arteries. Capillaries are the smallest blood vessels that comes off from the arteries and physically takes blood, oxygen and nutrients inside the blood to the cells that need it. It connects the arteries and vein and the it main function is to exchange

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).

Blood is a highly specialized complex connective tissue with a unique fluid of variable composition circulating through the heart, arteries, capillaries, and veins, known as the vascular system of the body (???). Blood approximately accounts of 8% of the body weight, with female body consists of 4-5 litres while males have around 5-6 litters. This variation is mainly due to the difference in body size between men and women (@@@). Human blood has a pH of 7.35-7.45, this makes the blood to be basic in nature. The viscous nature of blood makes it more resistant to flow than water. Unless blood is viscous, it can strain the heart and lead to severe cardiovascular problems (@@@). Due to the presence of high oxygen in arteries,

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.

Arteries carry blood away from the heart and veins carry blood to the heart. Arteries are thicker than veins because it need to withstand the high pressure of the outflow of blood from the heart. In other words, the flow of blood from the heart is at high pressure to reach all the parts of the body quickly. The two exceptions are the pulmonary artery and the pulmonary vein. The pulmonary artery is carries deoxygenated blood but all the other arteries carry oxygenated blood and the pulmonary vein carries oxygenated blood but all the other veins carry deoxygenated blood.

Introduction: Blood is a fluid that is transported through the heart arteries, capillaries, and veins. It is a liquid connective tissue that is responsible for transporting nutrients and wastes to various cells in the body. It is referred to as “River of Life” for its many roles including protecting the body from pathogens and carcinogens, from blood loss, and from imbalances pH, temperature, and homeostatic conditions of fluid balance. There are two basic components of blood including plasma and the formed elements. The plasma is the liquid in the fluid component of the blood consisting of mostly water and the solutes within the blood.

The heart is located in the chest between the lungs behind the sternum and above the diaphragm. It is surrounded by the pericardium. Its size is about that of a fist, and its weight is about 250-300 g. Its center is located about 1.5 cm to the left of the midsagittal plane. Located above the heart are the great vessels: the superior and inferior vena cava, the pulmonary artery and vein, as well as the aorta. The aortic arch lies behind the heart. The esophagus and the spine lie further behind the heart.