By studying the sheep s anatomy, you can learn how your own heart pumps blood through your body, thereby keeping you alive. A sheep s heart has four chambers like most mammals including humans. I could tell that this was going to be a messy lab. Dissection of the sheep heart offers students an excellent opportunity to learn about the anatomy of a mammalian heart. Obtain dissection kit, rubberlatex gloves, and optionally fashion yourself a dissection apron from the plastic on hand. What are some safety procedures to follow during a. May 28, 2014 sheep heart structures external and internal duration. Review the outer part of the heart and make sure you know where these structures are. Before starting the dissection of the heart, identify, or tentatively identify. Make sure each group has access to a camera to capture the steps of the dissection.
It is located in the mediastinum region central region of the thoracic cavity, between the lungs, and behind the sternum. The aim is to obtain a frontal section through the left and right side of the heart. Have one group member collect the materials and take them back to your lab station. In this investigation, the external and internal heart structure valves of a sheep s heart organ were examined and identified by dissection. Before proceeding to procedure b, read through the analysis questions as you should be answering these as you dissect the sheep heart. The goal of the lab is not, however, just to observe anatomy. External view of the sheep heart with probes showing the opening to the vena cava and pulmonary vein. Using chapter of your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report sheet. Differences between the two eye types will be mentioned as the dissection is completed. With your finger, touch the blood vessels placed on the top part of the heart. There will also be observable differences in the size of the hearts as well as differences in certain structures. Two of those chambers are receiving chambers called the right and left atrium.
Sheep heart dissection lab for high school science hst. Jun 02, 2015 dissection of the sheep heart june 2, 2015 video the vessels of the heart are identified in this video. Gloves to be worn by students conducting the dissection. Obtain a dissecting pan and a set of dissecting instruments. A sheeps heart has four chambers like most mammals including humans. How can you tell which side of the heart is the ventral surface. Watch for the coronary artery coming off of the aortic root right after the aortic valve. The first step in the dissection is to put on the rubber gloves before handling the raw hearts. The sheeps heart was the smallest because it is the smallest animal among the three species.
To examine the major features of a mammalian heart. Make a conclusion that combines your observations of the sheep eye and the information in the procedure that answers your hypothesis. Start studying exercise 20 dissection of the sheep heart. One eye of choice for dissection, that closely resembles the human eye, is that of the sheep. You are using brand new scalpels in this lab so please be extra cautious and as a. Figure 1 shows a diagram for the cow heart geometry that will be useful during the dissection. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Lab guide outlining the procedure for dissecting the sheep s heart. Mammalian heart dissection anatomybundleoflectures. Still, i was excited to do a sheep heart dissection because it was an opportunity for me to see a real heart. This muscular wall is the septum, and separates the right and left ventricles.
The strings that attach to the av cusps are called chordae tendinea. Sheep heart structures external and internal duration. These are called semilunar valves and prevent blood from flowing backwards from the arteries. Sheep heart dissection sheep heart dissection purpose to. During the dissection i had to be very cautious not to cut any valves of vessels that would result in negative results. Sheep heart dissection apologia general science, sheep. Heart dissection practical report free essay example. To trace the course of the flow of blood within the heart. Because we have such a small class, we are able to do things like this often. How many chambers are found in the mammalian heart.
Answer the questions heart dissection questions label the diagram of the human heart below. You will need to cut through the rest of your heart in order to identify. The heart is a muscle that pumps oxygenated blood and nutrients throughout the body. It includes photos to diagram where major vessels are and where incisions should be made to view internal structures, such as the mitral valve and papillary muscles. This dissection lab is a great noprep activity for biology and anatomy students to learn about anatomy and. Using your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report sheet. During the sheep heart dissection, you were asked initially to identify the right and left ventricles. Procedure day 1 you will not cut the heart open today. Use this sheep heart dissection guide in a lab for high school students. Show this to your teacher before you make the incision. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect the sheep heart.
The chordae tendineae are anchored to the ventricular walls via papillary nipplelike muscles. Mar 05, 2012 after performing the dissection my conclusion proved correct. Dissection of the sheep heart and human heart introduction the heart is a coneshaped muscular organ, about the size of your fist. In this procedure, the external and internal structures of a sheeps heart was examined and identified by dissection. Sheep eye dissection procedures the anatomy of the human eye can be better shown and understood by the actual dissection of an eye. The heart is a hollow organ, containing 4 chambers. Place the heart on the tray with its front facing upwards. Research what the fovea is and describe both its structure and. Observe the pericardium, and the blood vessels on top, which look like small tubes. Dissection teacher demonstrates correct dissection procedure for the specimen. Johnsons sheep heart dissection posted by stacyelambert purpose. Using your notes and wonderful memory, label the diagram of the human heart on your lab report sheet.
Exercise 20 dissection of the sheep heart flashcards quizlet. Sheep have a fourchambered heart, just like humans. Part of the reason it is so difficult to learn is that the heart is not perfectly symmetrical, but it is so close that it becomes difficult to discern which side you are looking at dorsel, ventral, left or right. If it a class dissection some of the most important safety procedures to follow include the following. Liberty science centers live from surgery program offers viewers a unique opportunity to watch real surgeries and envision a career in the medical field. Join liberty science centers live from surgery team for a sheep heart dissection. Sheep heart dissection procedure day 2 you will be cutting the heart open today. Sheep heart dissection lab report biology junction. By studying the sheep s anatomy, you can learn how your. Observations interior materials right atrium aorta observations posterior analysis flow chart analysis web tricupsid valve blood enters the right atrium through the superior and inferior vena cava blood goes through the tricuspid valve into the right ventricle sheep heart. Sheep heart dissection lab warren county public schools. Lab guide outlining the procedure for dissecting the sheeps heart. Also, as you can see in the graphs the size of the heart corresponded to the size of the animal.
Sheep heart dissection lab michigan state university. We started by locating the structures of the heart externally, such as the apex, atria, and ventricles and inserting probes in the vessels. Place a heart in the dissecting pan on the wax paper. We can also learn how the heart complements other organs and at the same time complements itself. Immediately after taking the heart out, i went over to the sink to rinse off the chemicals. Sheep heart dissection please note corrections in description. Next was to place the sheep heart on the dissection tray. Obtain a sheep heart, dissecting tray, dissecting instruments scalpel, scissors, metal probe and metal pointer, straws to be used as probes, gloves and goggles.
Vinyl apron and goggles to be worn by all students and the teacher. We dissected the pig, sheep, and cow hearts because these animals are inn the same class, their relative locations will be similar as well. Sheep heart dissection forms window to physiology the broadview. Procedure b dissection of a sheep heart human anatomy. Put on safety glasses or goggles, gloves, and lab apron. In this investigation, the external and internal heart structure valves of a sheeps heart organ were examined and identified by dissection. By studying the anatomy of a sheep s heart, you can learn about how your own heart pumps blood through your body and keeps you alive procedure observation. Inside the bag was a sheeps heart, sitting in a pool of preservative chemicals.
The heart is a muscular organ that pumps oxygenated blood and nutrients throughout the body. Read through the lab and answer the questions using the websites above as resources. Join the live from surgery team for a sheep heart dissection. It includes photos to diagram where major vessels are and where incisions should be made. Avoid contact, such as to the eyes, mouth, or other sensitive areas, with any chemicals. The following is the procedure for the actual dissection. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect. To open the right atrium, insert a blade of the scissors into the superior anterior in sheep vena cava and cut downward. Dissecting equipment sterilised prior to and after use. The human heart is similar in structure and function. By studying the sheeps anatomy, you can learn how your own heart pumps blood through your body, thereby keeping you alive. Performing a heart dissection sept 2016 science assist.
The heart dissection is probably one of the most difficult dissections you will do. Before proceeding to procedure b, read through the analysis questions, as you should be answering these as you dissect the sheep heart. Here are some links to pages of this dissection as pdf files from dr. A sheeps heart has four chambers like most mammals.
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