BIOLOGY REPORT Title: Mammalian heart dissection Name: Lambert Ntashamaje Co-worker ’s Name: Marc Koussi Date of Experiment: 13th January 2017 Words count: 1.Introduction: The aim of this experiment is to observe internal structure of a mammalian heart.
Heart, lungs and the Rest of You By: Olivia Abel 1.Explain how the blood flows throughout your lungs, heart and the rest of your body. Heart: Your left and right side of your heart work together to pump blood to and throughout your body which is separated by muscular tissue called the septum. In the right side blood enters through two large vein which are the inferior and superior vena cava, emptying poor oxygen blood from the body to the right reticulum. When the left side enters from the pulmonary veins and empties oxygen rich blood from the lungs into the aorta going throughout the body.
Inside, the heart is divided into four chambers. The four chambers are right atrium, right ventricle, left atrium, and left ventricle. The left and right sides are divided by a thick membrane called the interventricular septum. Each atrium is where blood will flow back into the heart, and each ventricle is where blood is pumped out.
The Pintails heart is like a mammals consisting of four chambers, two ventricles and two atria. The left ventricle pumps blood to all major organs in the body and throughout the rest, only excluding the lungs. This causes the left ventricle to be larger and more muscular. The lungs are fed blood from the right ventricle, which is the only the only function of that ventricle. The oxygenated blood coming from the lungs is fully separated from the oxygenated blood coming from other parts of the body.
Harvey William Harvey’s seminal work “On the Motion on the Heart and Blood in Animals” initiated modern medicine. Harvey’s arguments were detailed readily verifiable and though they did endure a fair bit of criticism when released, in most areas, they were accepted within his lifetime. Once his simple notion of the circulation of blood was carefully described others were able to see and understand its validity themselves. I will argue that William Harvey’s theory which used inductive reasoning to show, with experiments, how blood flowed from veins to arteries through the heart and deduced the existence of capillaries to return blood from arteries to veins. One of the main understandings of the day, proposed by Galen of Pergamon nearly 1500 years earlier, was that blood was a resource that was produced in the liver and consumed in the tissues and the brain.
The heart is a hollow muscular organ that lies within the mediasternum, a mass of tissue extending from the sternum down to the vertebral column between the lungs. Structurally, the heart is composed of three layers of tissue; epicardium, myocardium (middle layer) and endocardium (inner layer). The epicardium is a layer of muscle composed of mesothelium and connective tissue sheltering the external surfaces of the heart. This external layer is directly merged with the myocardium internally and is in contact with the serous layer of the pericardium. In some cases, it is viewed as a division of the inner layer of the pericardium, the pericardium being the membrane surrounding and protecting the heart essentially keeping the heart in its right
The purpose of the Sheep Heart Dissection lab was to take a look at the heart's anatomy and all the parts that it consists of. This lab helped us learn how the heart is able to function, and gave us a hands on look at what a real heart looks and feels like. I worked on this lab with Jose, and Alex. We completed the procedure in one day of class, and had the questions completed by the second.
The left ventricle is the primary pumping chamber, and heart failure normally begins on the left side. At the point when the left ventricle can't contract enough, it is called systolic heart failure. At the point when the left ventricle can't load with enough blood, it is called diastolic heart failure. You can have a blend of both sorts of heart
This type of shock occurs when the heart is unable to pump blood effectively. This is evident to patients who have had myocardial infarction, such as John’s case. In this illness, the heart has decreased contractility resulting to decreased cardiac output. Such decrease will stimulate the sympathetic nervous system to activate the compensatory mechanism by increasing the heart rate as evident in John’s vital sign to increase the peripheral pressure and ventricular
Veins transport blood to the heart and lungs at low pressure after receiving it from the capillaries. Valves inside the veins keep blood moving in one direction. The human body's arterial system branches out from one main artery, the dorsal aorta. Like veins, arteries have three layers: an outer layer of tissue, an inner layer of epithelial cells and a layer of muscle in between.
Systolic and Diastolic Heart Failure Heart failure occurs when the heart cannot pump enough blood for the body due to a weakened or damaged heart. The heart 's pumping action moves oxygen-rich blood as it travels from the lungs to the left atrium, then on to the left ventricle, which pumps it to the rest of the body. The left ventricle supplies most of the heart 's pumping power, so it 's larger than the other chambers and essential for normal function. (American Heart Association). In left-sided or left ventricular heart failure, the left side of the heart must work harder to pump the same amount of blood.
This allow desaturated blood to shunt right to left side, causing desaturation in the left side of the heart and in the systemic circulation causing hypoxia and cyanosis. PULMONARY ATRESIA / PULMONARY STENOSIS Pulmonary Stenosis is the narrowing at the entrance to the pulmonary artery causing right ventricular hypertrophy. Pulmonary Atresia is the severe form of pulmonary stenosis.
ASG1 A – Anatomy and Physiology 1. Describe the function of the heart, cardiac cycle and circulatory system Function of the heart The heart is a muscular organ that pumps and circulates blood throughout the body via a transport system of arteries and veins and capillaries. As the blood circulates throughout the body it supplies oxygen and nutrients to the tissues as well as removing carbon dioxide and harmful waste products (Tucker, 2015).
Right-sided heart failure is when the cardiac muscle on the right side of the heart becomes too weak to pump a sufficient amount of deoxygenated blood to the lungs. It is usually a complication of various conditions including lung diseases such as emphysema. This means that less oxygenated blood is taken from the lungs by the pulmonary veins and transported to the left side of the heart to then be pumped around the body. It can also produce a back-up of blood in the vessels within the body. This failure to pump sufficient blood to the lungs results in a build-up of fluid, which is known as oedema.