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.
The blood flow of the heart starts at the superior and inferior vena cava. The superior vena cava carries deoxygenated blood from the upper body into the right atrium, while the inferior vena cava carries deoxygenated blood from the lower body into the right atrium. As blood is pooled inside the right atrium, it will passively flow through the tricuspid valve into the right ventricle. The tricuspid valve is simply a one-way valve that prevents backflow of blood.
On this pig dissection we started off by taking the pig out of the bag letting some of the fluid drain off back into the bag so we will not get it everywhere. Then we placed our dissection mat down on the table laid the pig down on it and tied the pigs legs down, and back so we will have a good view of the abdomen region of the pig. We then identified the sex of our pig which in fact we had a female pig.
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 of the pig two larger tubes, and four smaller tubes. The heart was black near the back of it because of the blood build up. The heart was about the size of the pig’s foot and was smooth and squishy. The hearts over all color was pinkish red. It was surrounded by lots of blood vessels and tissue.
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.
Generate: Heart auscultation is useful in characterizing heart sounds and identifying abnormalities that may suggest cardiac dysfunction.1 The fourth heart sound (S4 atrial gallop), heard during the patient’s physical examination, is often an abnormal finding due to reduction in ventricular wall compliance.1,2 Additionally, S4 occurs due to rapid deceleration of active blood flow due to a nondistensible ventricle.2 S4 can be heard in patients with hypertension, hypertrophic cardiomyopathy and acute myocardial infarction (AMI).1,2
PERSONAL STATEMENT (NURFATIN BT MOHD SHAH) I want to further my study in this course because it is thrilling and rapidly- moving subject area, that is highly pertinent to the problem facing by society today. As far as I concern, cardiovascular disease is one of the popular cause of death. I am keen to learn more and involve in the latest advances in cardiovascular research. Over the years of studying, my interest in this area has increased.
The TEM showed the cardiac muscle structure in the untouched hearts in a Z-shape (a, b), while the regenerating heart cell arrangement began disconnecting and created lots of space between the cells (c, d). The myosin seen in the normal heart turns out to be disorganized (f), and after 7 days the space was once again present (e, f). Around the 7th day, the distortion of the cell structure increased, resembling those with BrdU. However, TUNEL proved that the cardiomyocytes appeared normal and showed no signs of apoptosis. Cells with the PH3 marker showed no signs of noticeable sarcomeric organization, while PCNA-positive cells showed the
Data analysis and t-test statistics have supported the hypothesis that Daphnia heart rate would increase when exposed to tobacco extract. Furthermore, tobacco exposure had negatively affected the overall health of the Daphnia specimen. Its heart rate became unusually low, and even after the release to its culture it appeared to be motionless, and possibly died as a result of the experiment. Unfortunately, the concentration of the tobacco extract was unknown, and had it been lower, the effects could have been different. Nonetheless, the experiment was successful due to the supported hypothesis.
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.
Another common test is cardiac catheterization. By running small tubes, called catheters, through the veins and injecting contrast dye, doctors can determine the blood pressure and blood flow levels inside the heart. A third usual test is an Echocardiogram where doctors take an ultrasound of the heart. It’s basically a movie showing the heart, and almost all defects/problems can be detected by it (Common Tests for Heart Disease). These modern marvels of medicine are key to quick diagnosis and
Family history and symptoms must be there to confirm diagnosis, and other tests may be performed to determine if the disease is present or not. One of the first tests that would be performed or recommended would be an echocardiogram. This will check to make sure the heart valves and size of the aorta are normal. Computerized tomography or magnetic resonance imaging may be used as well. If someone were to have the disease they will receive regular echocardiograms to monitor the heart.