The oxygenated blood comes from placenta to the fetus through umbilical vein to the fetus’s liver. Then it moves through ductus venosus. This allows some of the blood to go to the liver. But most of this highly oxygenated blood flow to the inferior vena cava and then into the right atrium of the heart. Most of the blood flow across to the left atrium through the foramen ovale.
The heart forces the ‘oxygenated’ blood through a range of connecting blood vessels specifically speaking arteries which travel around your body providing your cells with the necessary materials that the blood contains. As the blood reaches your cells the oxygen is released in order for the cells to function. The cells then give out waste materials which can include co2 and water. In order for your blood to receive these waste products they absorb it. We now have deoxygenated blood which goes through your veins aiming towards your heart.
Section A – Part II Cardiac cycle or heartbeat Blood enters and fills both atriums at the same time. When full the pressure causes the tricuspid and bicuspid valves to open and flows into the ventricles. Contraction (systole) of each atrium now forces any remaining blood into the ventricles. The ventricles now contract (systole) and atriums relax (diastole). The pressure closes the tricuspid and bicuspid valves (causes the first sound of the heart beat).
Myocardial perfusion imaging: Myocardial perfusion imaging (MPI) is a form of functional cardiac imaging, used for the diagnosis of ischemic heart disease. The underlying principle is that under conditions of stress, diseased myocardium receives less blood flow than normal myocardium. MPI is one of several types of cardiac stress test. A cardiac specific radiopharmaceutical is administered. E.g.
The independent variable is the various physical activity intensities (50 W, 100 W, and 200 W at 50 RPM). The dependant variable is the heart rate of the participant in beats per minute (BPM). The hypothesis is that with the increase of the resistance there will be an increase in heart rate and with the recovery heart rate will decrease. This is based on previous studies that have shown an increase in heart rate through exercise and a knowledge of the physiological functions of the
NATOMY AND PHYSIOLOGY In this assignment the author will describe the functions and structure of the main systems of the body and their interrelationship. 1. Explain the Function of the Heart and the structure of the Arteries, Capillaries and Veins: Function of the Heart: The heart is a muscular organ in humans which pumps blood through the bold vessels of the circulatory system. Blood provides the body with oxygen and nutrients and also assists in the removal of waste. The heart is a pump that drives the whole circulatory system.
 Explaination: The harder the heart works to push the blood ,the greater the force is on the arteries Blood pressure is expressed in terms of millimeter of mercury above the surrounding atmospheric pressure.Blood pressure readings have two numbers i.e top number and bottom number.The top number is called Systolic pressure.The bottom number is called Diastolic pressure.The blood flows through arteries and it delivers all necessary oxygen and nutrients the body needs to be healthy. Such a force occurs throughout the vascular system.  Systemic arterial blood pressure is most commonly called as blood pressure.However,measurement of pressures in the pulmonary vessels and venous system plays an important role in intensive care medicine.Blood pressure is influenced by the heart rate ,the amount of blood pumped by the heart and the ease with which blood travels through the body.The difference between the measured systolic and diastolic pressures is called pulse pressure.
A heart and lung bypass machine is used in order to allow oxygenated blood to continue to flow throughout the rest of the body.20 The VAD is then implanted into the right or left ventricle. A VAD specifically works by carrying blood through a tube from the ventricle to a pump. The pump then takes the blood to the aorta, where the blood can now be distributed to the rest of the body. A battery powered control unit is connected to the pump
The heart pumps the blood while the blood vessels deliver blood to all body parts. 6.1 Personal context The cardiovascular system ceases to perform its roles when some factors like diseases are involved. The diseases affecting this system is referred to as cardiovascular diseases or heart diseases. These heart diseases are among the major diseases with high rate of mortality and morbidity rate. The aged people are more prone to heart diseases including men.
Blood flows from your right and left atria into your ventricles through the open tricuspid and mitral valves. When the ventricles are full, the tricuspid and mitral valves shut which prevents blood from flowing back into the atria while the ventricles contract. As the ventricles begin to contract, the pulmonic and aortic valves are forced open and blood is pumped out of the ventricles.
The heart is a muscular organ the size of a clenched fist situated in the middle of the chest tilted slightly to the left. The heart receives its own oxygenated blood supplied by the coronary arteries and the coronary veins that take away the deoxygenated blood. The heart is made up of four chambers the left and right atrium and the left and right ventricle. The oxygenated blood travels from the lungs through the pulmonary veins, the pulmonary vein are the only veins in the body that carry oxygenated blood to the heart, the blood then enters the left atrium the blood is then pushed through the bicuspid valve, where the blood now enters the left ventricle where the blood is then pumped through the aortic valve into the aorta where the oxygenated
•Then travels to the bachmann’s bundle and the internodal pathways... •The internodal pathways then join together at the atrioventricular node... •As the bundle of his goes down the septum (the wall that divides the two sides of the heart) • it splits into the left and right bundle branch... •Which then produces the terminal purkinje fibres which travel up to the left and right ventricles (lower chamber of the heart) Structure of the heart The heart is basically a muscular, strong pumping organ that is located on the body’s midline in the chest area. The apex (located at the bottom tip of the heart) is turned more to the left so around 23 of the heart is found on the body’s left side, whilst 13 is on the right side. The heart’s base (the top of the heart) connects to the blood vessels (the aorta, vena cava, pulmonary trunk and pulmonary veins) of the body. The heart also has four chambers. The two atria (that are located either side of the heart) collect the blood and the two ventricles (also located either side of the heart) pump the blood out of the heart.
HFOV aims at accomplishing ultra fast tidal volume that are less than patients anatomic dead space. A mechanical diaphragm oscillates between 3-15 times a second which creates a push and pull effect on the airway from the endotracheal tube to alveoli. HFOV is useful in severe hypoxic respiratory failure and inpatient with large bronchopulmonary fistula where a tidal volume is lost through the chest tube. The advantage of HFOV is that it can increase the mean airway pressure and oxygenation without high subjecting lung tissue to distending pressures and volume. In essence, HFOV can prevent barotrauma as well as volutrauma.
Transposition of the Great Arteries, Pediatric A good way to understand this condition is to first think about how blood flows in the body. Arteries are blood vessels that carry blood away from the heart to other places in the body. The two largest of these arteries are called the great arteries. One of them, the pulmonary artery, takes blood from the heart to the lungs. In the lungs, oxygen is added to the blood.