Name: Nikia Martinez Class: Biology 240L L3-1201 Assignment: Electrocardiography Lab Report Due: April 3rd 2012 Professor: Dr. B. Schoffstall Introduction 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
Aim In this experiment, the external and internal structures of a sheep’s heart was examined and identified by dissection. To determine the functionality of a human heart since they are both mammals. Hypothesis Based on the external observation, the left side of the heart appeared bigger than the right side. When looking
How does it work? There are two types of artificial hearts, the first being a pump that is connected to the patient’s circulatory system; it maintains life when the patient’s heart is stopped for the surgeons to be able to operate on the heart. The second type is a self-contained mechanical heart that sits completely in the patient’s chest cavity. This second type of heart is known as a “VAD” pump which pumps blood from the left ventricle to the aorta. Most mechanical hearts use a centrifugal pump, which is quieter, uses less energy and lasts longer than the piston type mechanical hearts. The centrifugal pump produces a constant flow of blood around the body; therefore the patient will not have a
Introduction Congenital heart defects (CHD) are birth defects that are considered the common in the United States. These defects affect a newborn child’s blood flow to and from the heart and sometimes can leave the heart lacking parts that make it necessary for the heart to do its job.
Almost 80% of people die from heart disease. The only way to know your level of risk is to be assessed by a healthcare professional and to be checked for factors such as your blood pressure, cholesterol and glucose levels, waist measurement and BMI. Once you know your overall risk, agree with your healthcare professional on a plan for specific actions you should take to reduce your risk for heart disease and stroke. The Circulatory System is made up of three main parts: The heart, the blood vessels and the blood. Sometimes the watery fluid called lymph and the vessels that carry it are considered to be part of the Circulatory System. The heart is a special pump that pumps the blood around the body. The purpose of this paper was to summarize information about the heart, explain how it works, and discuss its purpose. It was said that the heart evolves through several different stages inside the womb, first resembling a fish's heart, then a frog's, which has two chambers, than a snake's, with three, before finally adopting the four-chambered structure of the human heart. I also told you how the heart works. When the heart contracts, the chambers become smaller, forcing blood first out of the atria into the ventricles, then from each ventricle into a large blood vessel connected to the top of the heart. Now the purpose of the heart is the size of its owner's clenched fist, the organ sits in the middle of the chest, behind 1the breastbone and between the lungs, in a moistened chamber that is protected all round by the rib cage. It can also be easy to fix the heart. The only way to know your level of risk is to be assessed by a healthcare professional and to be checked for factors such as your blood pressure, cholesterol and glucose levels, waist measurement and BMI. The heart is very important for your
Now, let's talk how the heart works. The heart is divided into two halfs. Each side has a upper and a lower chamber. The upper right chamber revives poor-oxygen blood from the body. The lower right chamber pumps
The heart is a specialised muscle that pumps blood around the body. Blood carries oxygen and nutrients around the body and carries waste products to organs in order to be removed. The heart is divided into 2 pumps, that simultaneously work together. Blood that comes back from delivering nutrients to the organs enters the heart on the right side and is then pumped through to the lungs. Lungs will then remove the carbon dioxide, and recharge the blood with oxygen. (heartfailurematters.org. (2012, February)
The heart beats about 1000,000 times every day sending 2,000 gallons of blood thought your body. The hearts job is keeping blood flowing through 60,000 miles of blood vessels that feed organs and tissues. The cardiac muscle is the tissues that make up your heart. The heart sends blood around your body. When there is a problem with your heart and it can’t pump blood it is critical for it to be fixed. This is when the cardiovascular surgeon steps in.
Our demonstration’s final results is the exhibition of a heart model with its anatomy labeled and painted red tubes inserted showing the circulation of blood along with the research to achieve our purpose for this demonstration. The purpose is to explain info on the heart, how the heart functions, what
The heart: Myocardial infraction The heart is an organ that pumps blood around the body by using 2 separate pumps side by side. The left side of the pump deals with oxygenated blood from the lungs whereas the right one deals with deoxygenated blood from the body. Each pump has 2 chambers called atrium and ventricle. The walls of the atrium are thinner than the ventricle because the atrium only has to pump blood to a short distance (to the ventricle) whereas the ventricles need to pump blood to the rest of the body. The heart has 3 types of pacemaker cells called; Sino atrial (SA) node, Atrioventricular (AV) node and bundle of His which make up the electrical conduction system. SA node found in the right atrium sends a wave of depolarisation to the neighbouring muscle junction, to the left atrium by the Bachmann’s bundle and also to the AV node by the internodal tract. AV node delays the wave of depolarisation causing the ventricle to contract after the atria. The AV node causes that delay to allow all the blood to fully move from the atria to the ventricle then the ventricle can contract sending the blood out the heart. After the AV node has delayed the wave of depolarisation, the wave continues down by a bundle of His and the fibres split up by the Purkinje fibres allowing the muscle to get involved. The wave of electrical released from the fibres causes the ventricles to contract.
The design of these hearts is close to the structure of the natural heart. The heart that humans carry has two pumps and four chambers. The right atrium gathers oxygen-drained blood and pumps it to the lungs. The left atrium receives oxygen-rich blood from the lungs to and pumps this blood out of the body. The valves’ function is to control the blood flow (Raghunandan Avula). On the other hand, artificial heart has three subsystems placed under the skin. These subsystems are the heart pump, a pump controller, and a power source. The battery of the heart is charged with a special magnetic charger. Energy from the external charger is transferred to internal battery through an energy transfer device known as transcutaneous energy transmission (National Heart, Lung, and Blood
Families that need a heart transplant will be very happy if the transplant works. The negative of the heart is usually it beats about 50 to 70 times each minute, and the heart rate may increase 2- to 3-fold during stress or exercise. The economical disadvantages for the person receiving the treatment Estimates of the cost of the artificial heart include charges for the surgical procedure, device and console, and continuing medical surveillance. These estimates range from a low of $100,000 to a high of $300,000 per patient in the initial year. The stress and lack of exercise will restrict the patients from doing regular exercise because the new heart wouldn’t be able to pump fast enough so it could lower the patients moral. Economical influences consist of the amount of money that is available to the patient so people living in second and third world countries wouldn’t be able to afford the heart. The positive affect for the moral of the patient would be the patient receiving the transplant would be alive and their moral will be high. This will factor the limit of how much sport and everyday activities like going in the pool and climbing because the heart stays the same beat the whole time and wouldn’t be able to get wet a lot. Even though you wont be doing a lot of things you would normally do you can still do activities but with a lower intensity. If you do normal day activities and high intensity running the mechanical or biological heart will cause the heart that you have to have a even more limited life span or even causing the artificial heart to stop functioning. If your artificial heart stops working that will cause you to be rushed to hospital or if you cannot get to hospital quick enough you will have no blood pumping though your
The heart is made up of cardiac muscle. It contains nervous tissue, which conducts the heart's electrical signals to make it contract. It contains epithelium, which supply the heart muscle with oxygen and nutrients. It also contains fatty tissue, which protects the heart. The lungs tissues are made up mainly of
The heart is a very complex and complicated structure. It has many different functions and is vital to human life. The heart also supplies the body with oxygen and other nutrients and other numerous things. There are many different parts in the heart contributing to the endless cycle.
The human heart is slightly bigger than the size of ones fist. It is situated at a very safe place which is between the cage bones, i.e., in the center of the chest. Usually it is slightly on the left side of the chest but in rare cases, it can be found on the right side. Heart is responsible for the blood flow to every single part of the body by constant contraction and relaxation of cardiac muscles. This is the reason why we hear rhythmic beats all the time. Heart pumps the pure blood to the different parts of the body and then takes the deoxygenated blood from all the parts to the lungs for oxygenation. Normally in a minute the heart beats 72 times. Well, let 's check out heart diagram for kids as well as for adults which can help you