Avoid contact, such as to the eyes, mouth, or other sensitive areas, with any chemicals. These are called semilunar valves and prevent blood from flowing backwards from the arteries. Procedure b dissection of a sheep heart human anatomy. External anatomy most heart diagrams show the left atrium and ventricle on the right side of the diagram. External view of the sheep heart with probes showing the opening to the vena cava and pulmonary vein. Sheep heart dissection apologia general science, sheep. To examine the major features of a mammalian heart. Before proceeding to procedure b, read through the analysis questions, as you should be answering these as you dissect the sheep heart. 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. Obtain a dissecting pan and a set of dissecting instruments. How many chambers are found in the mammalian heart.
Put on safety glasses or goggles, gloves, and lab apron. Immediately after taking the heart out, i went over to the sink to rinse off the chemicals. We can also learn how the heart complements other organs and at the same time complements itself. Here are some links to pages of this dissection as pdf files from dr. Place the heart on the tray with its front facing upwards. Mar 05, 2012 after performing the dissection my conclusion proved correct. Sheep heart dissection lab report biology junction. The heart dissection is probably one of the most difficult dissections you will do. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect. In this procedure, the external and internal structures of a sheeps heart was examined and identified by dissection.
Dissection of the sheep heart and human heart introduction the heart is a coneshaped muscular organ, about the size of your fist. During the sheep heart dissection, you were asked initially to identify the right and left ventricles. It is located in the mediastinum region central region of the thoracic cavity, between the lungs, and behind the sternum. A sheeps heart has four chambers like most mammals. In this investigation, the external and internal heart structure valves of a sheep s heart organ were examined and identified by dissection. Differences between the two eye types will be mentioned as the dissection is completed. To trace the course of the flow of blood within the heart.
Start studying exercise 20 dissection of the sheep heart. May 28, 2014 sheep heart structures external and internal duration. Research what the fovea is and describe both its structure and. The heart is a muscle that pumps oxygenated blood and nutrients throughout the body. Place a heart in the dissecting pan on the wax paper. In this investigation, the external and internal heart structure valves of a sheeps heart organ were examined and identified by dissection.
Have one group member collect the materials and take them back to your lab station. Liberty science centers live from surgery program offers viewers a unique opportunity to watch real surgeries and envision a career in the medical field. Procedure day 1 you will not cut the heart open today. Gloves to be worn by students conducting the 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. Before starting the dissection of the heart, identify, or tentatively identify. It includes photos to diagram where major vessels are and where incisions should be made.
Join the live from surgery team for a sheep heart dissection. Sheep heart dissection sheep heart dissection purpose to. Lab guide outlining the procedure for dissecting the sheep s heart. I could tell that this was going to be a messy lab. Using your notes and wonderful memory, label the diagram of the human heart on your lab report sheet. How can you tell which side of the heart is the ventral surface. 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. By studying the sheep s anatomy, you can learn how your own heart pumps blood through your body, thereby keeping you alive. Obtain a sheep heart, dissecting tray, dissecting instruments scalpel, scissors, metal probe and metal pointer, straws to be used as probes, gloves and goggles. Two of those chambers are receiving chambers called the right and left atrium. Using your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report sheet. The following is the procedure for the actual dissection.
Heart dissection practical report free essay example. 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. Review the outer part of the heart and make sure you know where these structures are. Sheep heart dissection forms window to physiology the broadview.
Learn vocabulary, terms, and more with flashcards, games, and other study tools. Sheep heart dissection procedure day 2 you will be cutting the heart open today. The heart is a muscular organ that pumps oxygenated blood and nutrients throughout the body. Watch for the coronary artery coming off of the aortic root right after the aortic valve. Answer the questions heart dissection questions label the diagram of the human heart below. What are some safety procedures to follow during a. Dissection teacher demonstrates correct dissection procedure for the specimen. Inside the bag was a sheeps heart, sitting in a pool of preservative chemicals. If it a class dissection some of the most important safety procedures to follow include the following. Sheep heart dissection lab for high school science hst. Mammalian heart dissection anatomybundleoflectures.
One eye of choice for dissection, that closely resembles the human eye, is that of the sheep. To open the right atrium, insert a blade of the scissors into the superior anterior in sheep vena cava and cut downward. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect the sheep heart. Dissection of the sheep heart offers students an excellent opportunity to learn about the anatomy of a mammalian heart. Sheep heart dissection lab warren county public schools. Jun 02, 2015 dissection of the sheep heart june 2, 2015 video the vessels of the heart are identified in this video. By studying the sheep s anatomy, you can learn how your. Sheep heart dissection lab michigan state university.
Also, as you can see in the graphs the size of the heart corresponded to the size of the animal. The chordae tendineae are anchored to the ventricular walls via papillary nipplelike muscles. Show this to your teacher before you make the incision. Next was to place the sheep heart on the dissection tray. We dissected the pig, sheep, and cow hearts because these animals are inn the same class, their relative locations will be similar as well. A sheep s heart has four chambers like most mammals including humans. Use this sheep heart dissection guide in a lab for high school students. Exercise 20 dissection of the sheep heart flashcards quizlet. Each heart has the same function so therefore the basic anatomy of each heart was the same. The human heart is similar in structure and function. The goal of the lab is not, however, just to observe anatomy.
By studying the sheeps anatomy, you can learn how your own heart pumps blood through your body, thereby keeping you alive. Sheep have a fourchambered heart, just like humans. Still, i was excited to do a sheep heart dissection because it was an opportunity for me to see a real heart. Read through the lab and answer the questions using the websites above as resources. Johnsons sheep heart dissection posted by stacyelambert purpose. This dissection lab is a great noprep activity for biology and anatomy students to learn about anatomy and.
The strings that attach to the av cusps are called chordae tendinea. Using chapter of your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report sheet. Join liberty science centers live from surgery team for a sheep heart dissection. We started by locating the structures of the heart externally, such as the apex, atria, and ventricles and inserting probes in the vessels. Observe the pericardium, and the blood vessels on top, which look like small tubes.
The first step in the dissection is to put on the rubber gloves before handling the raw hearts. This muscular wall is the septum, and separates the right and left ventricles. Sheep heart dissection please note corrections in description. Vinyl apron and goggles to be worn by all students and the teacher. The heart is a hollow organ, containing 4 chambers. You are using brand new scalpels in this lab so please be extra cautious and as a.
Dissecting equipment sterilised prior to and after use. There will also be observable differences in the size of the hearts as well as differences in certain structures. Figure 1 shows a diagram for the cow heart geometry that will be useful during the dissection. Lab guide outlining the procedure for dissecting the sheeps heart. With your finger, touch the blood vessels placed on the top part of the heart. Obtain dissection kit, rubberlatex gloves, and optionally fashion yourself a dissection apron from the plastic on hand. Sheep heart structures external and internal duration.
Because we have such a small class, we are able to do things like this often. Make sure each group has access to a camera to capture the steps of the dissection. The aim is to obtain a frontal section through the left and right side of the heart. The sheeps heart was the smallest because it is the smallest animal among the three species.
283 754 928 565 618 670 1342 1357 376 819 830 896 969 1402 866 953 408 246 1136 367 284 1437 1597 970 1068 247 1229 822 389 436 34 1439 117 1086 394 413 495 609 1139 804 749 1119 878 155 78 1189