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
The heart is a very strong muscle that has one major job. The heart’s job is to pump blood throughout the entire body. The heart is made up of 4 chambers, and 4 valves. There is the right and left atrium, and a right and left ventricle. The atriums are the superior chambers, and the ventricles are inferior chambers. The left ventricle is the most important, because that is where the blood travels through to go to the aorta, and eventually the rest of the body (Taylor 2015).
The Heart is hollow organ which is composed of four muscular chambers the right and left atrium and ventricles that is specialized for pumping blood throughout the body. The heart is also consists of four valve; two atrioventricular valve which is the bicuspid and tricuspid valve that is allowing blood to flow in the atria and closes when there is a increase ventricular pressure that prevent backflow into the atria as ventricles contract (Craft, Gordon, and Tiziani, 2011), and the semilunar valves which include the pulmonary and aortic valves is located at the exit of the large arteries from the ventricles that opens when there is intraventricular pressure exceeded the aortic and pulmonary pressure which allows the blood flow into the systemic
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
and unhealthy. If heart is deficient, the lips may appear bluish. The heart governs the mental activities and emotional processes. The Western medicine may have expressed some disagreement with this function. Fire The heart does not only pump blood throughout the body to maintain life, so the heart
Purpose: To investigate the structure of the heart. Introduction: Every day, the approximately 5 liters of blood in your body travel many times through about 97,000 kilometers of blood vessels that branch and cross, linking the cells of our organs and body parts. From the hard-working heart, to our thickest arteries, to
In this lab, the students observed the rate and rhythm and how it fluctuates when an individual is relaxed, in a seated position, and after exercising. The Heart is a hollow muscular organ that is cone shaped and it is located in the mediastinum in between the lungs (The Heart, Slide 3 2016). The heart is separated into two main divisions, the pulmonary circuit and the systemic circuit. The pulmonary circuit helps carry blood to the lungs from the heart for gas exchange and it is located in the right side of the heart. In the pulmonary circuit the heart fills with blood in the right atrium then it passes through the right atrioventricular valve which then leads to the right ventricle. Once it is in the right ventricle, the right ventricle contracts which opens the pulmonary valves. After this blood flows from the pulmonary valve to the pulmonary trunk which then distributes it into the right and left pulmonary arteries that supply the lungs where it deposits oxygenated blood.
The cardiovascular system consists of the heart, blood, and valves. The cardiovascular system is able to transport things such as oxygen, nutrients, cell wastes, hormones and other substances vital for the maintenance of homeostasis as well as cell life through blood. The hearts function is to pump the blood in and out of the heart to propel it throughout the rest of the body. Deoxygenated blood enters through the pulmonary circuit through the superior and inferior vena cavae and dumps into the right atrium, then travels through the tricuspid valve into the right ventricle through the pulmonary semilunar valve and out of the pulmonary arteries. When the blood exits the pulmonary arteries into the lungs, gas exchange occurs. Oxygenated blood enters the systemic circuit through the right and left pulmonary veins into the left atrium, through the bicuspid or mitral valve into the left ventricle through the aortic valve and out of the aorta to the rest of the body and back again. The valves of the body carry the blood and help to manage blood pressure throughout the
In mammals each organ serves its own importance to the life and survival of that individual and if one is not working properly it can result in a disturbance in its general physiology. One of those organs is the heart, which serves as a pump that helps circulate blood throughout the body. It also serves in the process to oxygenate the blood by pushing the blood to the lungs. This happens by the blood first entering the right atrium at a low pressure and then it is pushed out of the right ventricle at a high pressure to the lungs, where the carbon dioxide and oxygen are exchanged. The oxygenated blood then returns to the heart through the left atrium, at low pressure, and then is forced through the rest of the body by the left ventricle, at
The cardiac system, as mentioned in the introduction, is comprised of three major parts: the heart, the blood vessels, and the blood itself. The heart is the primary mechanism that acts as a pump to establish a pressure gradient to move blood through the system using blood vessels. Without the heart in operation, the body would cease to have the vital flow of blood which contains necessary oxygen, nutrients, and waste needing to be disposed of. The vessels are the roads that blood travels through and they vary in size to increase or decrease blood pressure through them. This is how a sphygmomanometer and stethoscope combined can be used to show and derive how blood pressure.
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 human heart is very beneficial for lifestyle. Not only does it help us for structural purposes, it can also help us and others know what people are going through. In the end, these two purposes of the heart can make or break us as people. In Brian Doyle’s excerpt
The heart is what keeps all living breathing species alive, animals or humans. If the heart was to shut down but the nervous system continued and was active, it would not matter. The entire body would shut down because once the supplier no longer delivers what is needed; organs will no longer function correctly, therefore causing irreversible damage. Arteries are what carried the rich oxygenated blood from the heart to the rest of the organs throughout the body. The Veins are what bring back the carbon dioxide blood to the heart. It then has to be put through a cycle so that it can be shipped back out. Blood travels from the right atrium through the tricuspid valve, to the right ventricle. From there, it is pumped to the lungs, the oxygen-rich blood goes to the left atrium and then through the mitral valve to the left ventricle where it goes to the aorta to be pumped around the body (Colombo 7). What looks to be a complicated process that would take hours or minutes is actually done in a matter a seconds.
1. Outline the structures of the cardiovascular system The transporting of blood through the whole body is done by the cardiovascular system. This one continuum of blood vessels and arteries and is used to transport blood away from the heart and veins transport the blood back toward the heart. Capillaries are used to transport blood to tissues cells and the exchanging site for nutrients, gases and wastes. The heart is also a part of the cardio vascular system Approximately the size of a person’s fist the heart is a Hollow cone shaped, Weighs approximately 300g, 2/3 left of the median plane And is located in the bony thorax between the lungs. The pointed apex of the heart is pointed toward the left hip and rests on the diaphragm. The heart consists of the myocardium which is the middle muscle layer of the heart. The endocardium which is the inner most layer of the heart and The Pericardium is a double layer of serous membrane with serous fluid in between. It protects the heart and anchors it to surrounding structures the pericardium which a visceral inner and partial outer layer of the heart.
We have learned that the heart is a complex muscle that pumps blood throughout the body for the purposes of tissue oxygenation and gas exchange (waste removal). We must now discuss the four separate chambers of the heart through which this blood flows through. To start, the two upper, or superior chambers are known as the atria, and the two lower, or inferior chambers are known as the ventricles. These four chambers can further be separated into left and right half’s. Each half contains a superior pumping chamber – the atria, and an inferior pumping chamber – the ventricles. Each of these chambers have an important and specific job to perform during the circulatory process.