Closed → Vertebrates • Pump • Vessels • Circulatory fluid 2 Circulatory system - Open • Insects and some molluscs • Blood pumped by heart → blood spaces • Sinuses • Blood in direct contact with tissues • Returns to heart via open veins • No control 3 Circulation in vertebrates 4 Double circulation • Blood moves through heart 2x during a circuit – Lungs – Body – Low pressure from lungs‚ • Birds • Warm blooded creatures • High metabolic rate – Requires good
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Chapter 23 - The Heart 331 The Heart - Key 1 2 3 What is the name of the central region of the thorax? The central region of the thorax is the mediastinum. About how much of the heart is to the left of the mid-sternal line? Two-thirds of the heart is to the left. Where is the location of the apex of the heart? The apex of the heart is located to the left at the fifth intercostal space. Figure 23.2 11 In reference to Figure 23.2‚ identify #1 - #3. 3 Epicardium 1 Pericardium 2 Pericardial
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MD‚ PhD‚ St. Louis‚ Mo Objectives: Juxta-anastomotic stenosis (JAS) is one of the predominant causes of arteriovenous fistula (AVF) failure‚ with the reported incidence as high as 65%. We hypothesized that technical modification to alter the outflow vein configuration using the novel piggyback Straight Line Onlay Technique (pSLOT) would prevent JAS and improve AVF maturation. Methods: Intention-to-treat analysis of the outcomes of consecutive distal radiocephalic (RC) fistulas performed by a single operator
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cardiovascular system as comprising two distinct networks of arteries and veins. Galen claimed that the liver produced blood that was then distributed to the body in a centrifugal manner‚ whereas air was absorbed from the lung into the pulmonary veins and carried by arteries to the various tissues of the body. Arteries also contained blood. This was an open-ended system in which blood and air simply dissipated at the ends of veins and arteries according to the needs of the local tissue. Blood was not
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Arteries carry blood away form the heart the extremities and organs. They have typical three layer blood vessel wall structure with a thick tunica media. The walls of arteries are highly compliant due to the elastic fibres present. The wall thickness of the arteries varies in based on the proximity to the heart. The elasticity of arteries allows pressure absorption from the left ventricle of the heart as it pumps blood into the arteries. There are two significant types of arteries‚ elastic and muscular
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ANATOMY AND PHYSIOLOGY Chronic Kidney Disease Cardiovascular System The cardiovascular system is sometimes called the circulatory system. It consists of the heart‚ which is a muscular pumping device‚ and a closed system of vessels called arteries‚ veins‚ and capillaries. As the name implies‚ blood contained in the circulatory system is pumped by the heart around a closed circuit of vessels as it passes again and again through the various "circulations" of the body. The Heart * The heart is enclosed
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September 30‚ 2012 Introduction/Purpose In this lab experiment‚ I examined a pig’s heart and compared it to a human’s heart. The pig’s heart is very similar to a human’s heart by having the same structures‚ veins‚ valves‚ and chambers. I was unable to perform hands on examination on a human heart so I examined a pig’s heart. I was able to identify major areas of the heart and dissect it to examine the inside chambers and valves. This experiment helped me
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right femoral vein of a healthy female. I am your pilot Kierra Lewis. While we embark on this journey‚ make sure that you keep your hands and feet inside the submarine at all times. Fasten your seat belts and let’s start our journey! We will begin our journey in the femoral vein. As you can see the femoral vein is a blood vessel that is responsible for carrying blood from the leg back to the heart via the iliac veins. This is the largest vein in the groin area. Any blockages in this vein can lead to
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The body is a very complex mechanism. There are many different veins and arteries that flow throughout the body. With there being many different veins and arteries throughout the body there are multiple paths to get to the lower lobe of the lung. In this paper we will discuss how to get from the femoral vein to the lower lobe of the lung. The path that I have chosen to discuss to get to the lower lobe of the lung from the femoral vein involves the inferior vena cava‚ AV valve‚ right ventricle‚ pulmonary
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the human circulatory system From left to middle to right. Left Pulmonary Artery Vena Cava Right Atrium Right Ventricle Pulmonary Artery Hepatic Vein Renal Vein Middle Head And Arms Lungs Liver Digestive system Kidneys Sex Organs and Legs Right Aorta Left Atrium Left Ventricle Pulmonary Vein Hepatic Artery Hepatic Portal Vein Renal Artery. In this form‚ oxygen is transported from the lungs to the many cells of the body. Red blood cells are bi-concave so it can have a larger
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