Pat the heart dry and place it in your dissection tray. Sheep heart dissection lab magnolia west high school. To examine the major features of a mammalian heart. The blood flow through the sheep heart is like that. Place the heart on the tray with its front facing upwards. The heart is a hollow organ, containing 4 chambers.
So some structure that is quite in the middle can be lateral to another structure. Two of those chambers are receiving chambers called the right and left atrium. Vinyl apron and goggles to be worn by all students and the teacher. The heart is a muscular organ that pumps oxygenated blood and nutrients throughout the body. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect. Obtain a sheep heart, dissecting tray, dissecting instruments scalpel, scissors, metal probe and metal pointer, straws to be used as probes, gloves and goggles. The aim is to obtain a frontal section through the left and right side of the heart. The purpose of the sheep brain dissection is to familiarize you with the three. The vessels of the heart are identified in this video. A sheeps heart has four chambers like most mammals. Jun 02, 2015 dissection of the sheep heart june 2, 2015 video the vessels of the heart are identified in this video.
The sheep heart is an excellent specimen to use for comparative human anatomy in both size and function. Sheep heart dissection dissection of sheep heart is valuable because it is similar in size and structure to the human heart. Exercise 20 dissection of the sheep heart flashcards quizlet. Terms in this set 4 during the sheep heart dissection, you were asked initially to identify the right and left ventricles without cutting into the heart. Also, a dissection experience allows you to view structures in a way not possible with models and diagrams. Read through the analysis questions on your lab report as you should be answering them as a groups as you dissect the sheep heart. This dissection will allow you to become more familiar with the structures of the heart, while giving you experience in dissection. Review the outer part of the heart and make sure you know where these structures are.
I could tell that this was going to be a messy lab. This video was produced as part of a student project during. Inside the bag was a sheeps heart, sitting in a pool of preservative chemicals. Using your notes and wonderful memory, label the diagram of the human heart on your lab report sheet. Arrange the kidney so that the renal sheath, which contains the ureter, is.
The strings that attach to the av cusps are called chordae tendinea. With each type of brain there will be differences in size, structure, and brain regions, but the general structures and their area of location are relatively the same or very similar. Sheep heart dissection lab michigan state university. Johnsons sheep heart dissection posted by stacyelambert purpose. This video demonstrates the dissection of a sheep s heart in a laboratory setting. Imagine the heart in the body of a person facing you. Learn about human anatomy with a fetal pig dissection, since a lot of the. Insert your dissecting scissors or scalpel into the left auricle at the base. Dissection of the sheep heart offers students an excellent opportunity to learn about the anatomy of a mammalian heart. Johnsons sheep heart dissection posted by stacyelambert. The dissection of the sheep heart posted by shannon muskopf. May 28, 2014 sheep heart structures external and internal duration.
Sheep heart dissection common core science, anatomy. The left side of their heart is on their left, but since you are facing them, it is on your right. This dissection guide was revised october 2014 with improved instructions and color images for a better dissection and easier identification of internal and external anatomy. Also note the abundance of fat along the paths of various blood vessels. Read through the lab and answer the questions using the websites above as resources. Still, i was excited to do a sheep heart dissection because it was an opportunity for me to see a real heart. Answer the questions heart dissection questions label the diagram of the human heart below. In this procedure, the external and internal structures of a sheeps heart was examined and identified by dissection. The heart dissection is probably one of the most difficult dissections you will do.
Throw out the gloves and any remaining pieces of sheep heart. One pig heart dissection tools dissection tray gloves procedure. Procedure b dissection of a sheep heart human anatomy. To dissect and compare the anatomy of a sheep, pig, and cow heart. By studying the sheeps anatomy, you can learn how your own heart pumps blood through your body, thereby keeping you alive. In humans it is situated obliquely between the lungs, with about twothirds of its mass to the left of the midline. Still, i was excited to do a sheep heart dissection because it was an. Learn about biology through dissecting a frog, earthworm, fetal pig, or owl pellet.
The sheep heart is mammalian, having four chambers like the human heart, which includes two atria and two ventricles. The heart is then cut in half the the internal structures are revealed. Sheep heart dissection lab for high school science hst. 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.
Most of the great vessels pulmonary artery, aorta, and superior vena cava emerge upward. Dissecting equipment sterilised prior to and after use. This heart dissection guide includes labeled fullcolor photos of mammalian heart anatomy and instructions on how to dissect the heart. Immediately after taking the heart out, i went over to the sink to rinse off the chemicals. Sheep heart dissection apologia general science, sheep. Use a scalpel to make an incision in the heart at the superior vena cava. During this procedure, what differences did you observe. Remember, the heart is a hollow, muscular organ that pumps blood through the arteries.
The function of the apex is to regulate the contractions of the ventricles so they are welltimed to the contractions of the atrium. Next was to place the sheep heart on the dissection tray. Sheep heart dissection lab guide outlining the procedure for dissecting the sheeps heart. On the outside of the heart is the visceral pericardium, which is a thin, transparent layer on the surface of the heart. Dispose of the sheep heart per your teachers instructions. The apex of the heart is the lowest part of the heart. Before starting the dissection of the heart, identify, or tentatively identify. The chordae tendineae are anchored to the ventricular walls via papillary nipplelike muscles. Dissection teacher demonstrates correct dissection procedure for the specimen.
To open the right atrium, insert a blade of the scissors into the superior anterior in sheep vena cava and cut downward. Hearts from packing houses usually come with the major blood vessels trimmed very close to. To trace the course of the flow of blood within the heart. It is located in the mediastinum region central region of the thoracic cavity, between the lungs, and behind the sternum. Learn vocabulary, terms, and more with flashcards, games, and other study tools. By studying the anatomy of a sheeps heart, you can learn about how your own heart pumps blood through your body and keeps you alive procedure observation. However, since each species is a different size the size of the heart and its parts should vary in size and correspond to the species size. Before proceeding to procedure b, read through the analysis questions, as you should be answering these as you dissect the sheep heart. Gloves to be worn by students conducting the dissection. The dissection of the sheep heart posted by shannon muskopf mrs.
The human heart is similar in structure and function. During the dissection i had to be very cautious not to cut any valves of vessels that would result in negative results. How can you tell which side of the heart is the ventral surface. Lab guide outlining the procedure for dissecting the sheep s heart. A sheep s heart has four chambers like most mammals including humans. Sheep heart dissection please note corrections in description. The first step in the dissection is to put on the rubber gloves before handling the raw hearts. The incision should follow the line of the right side of the heart so that you can open just the right side and see the right atrium, the right ventricle, and the tricuspid valve between them 2.
How many chambers are found in the mammalian heart. Heart dissection walk through the heart dissection is probably one of the most difficult dissections you will do. We dissected a heart in order to visually understand the parts of the heart, what its made of, how it works, and what it looks like in real life. Using your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report. On the outside of the heart is the visceral pericardium. These are called semilunar valves and prevent blood from flowing backwards from the arteries. Using chapter of your textbook andor your notes and heart diagram worksheet, label the diagram of the human heart on your lab report sheet.
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. You will need to cut through the rest of your heart in order to identify. 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. Sheep heart structures external and internal duration. Lay a few pages of newspaper on the bench and put the dissecting board on them. Once you have identified the base and apex and anterior toward the front and. 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 sheep heart ventral surface up see figure 1 below. Find full dissection guides including pictures or videos for free. Goggles 1 pig heart 1 dissection tray tools dull probe, forceps, scissors for second half of dissection procedure. Identify the right and left sides of the heart obtain a sheep heart and place the heart in a dissecting tray.
Place the kidney on its side on the dissection board and carefully remove the fat from around the kidney. By examining a heart we can learn many different things like for example, how all of its parts work together in order to make the. Demonstration of a heart dissection including external and internal features, the four main vessels connecting to the heart, and an explanation of the blood pathway. A sheeps heart has four chambers like most mammals including humans. Insert your probe into the pulmonary artery and see it come through to the right ventricle. 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 sheep heart dissection purpose to. In this investigation, the external and internal heart structure valves of a sheeps heart organ were examined and identified by dissection. Sheep heart dissection lab report biology junction. Among all three species the heart serves the same purpose so therefore its anatomy should be the same. Dissection of a kidney mrs scrivens virtual classroom.
In this investigation, the external and internal heart structure valves of a sheep s heart organ were examined and identified by dissection. Use this sheep heart dissection guide in a lab for high school students. Sheep heart dissection procedure day 2 you will be cutting the heart open today. Position your heart in the tray so that it matches the diagram below. Sheep have a fourchambered heart, just like humans. Drain the tray of water and return the tools and tray neatly to the front desk. The incision should follow the line of the right side of the heart so that you can open just the right side and see the right atrium, the right ventricle, and the tricuspid valve between them. The heart is a muscle that pumps oxygenated blood and nutrients throughout the body. Start studying exercise 20 dissection of the sheep heart.
Dissection of the sheep heart and human heart introduction the heart is a coneshaped muscular organ, about the size of your fist. Introduction when you have finished examining the model, you are ready to begin your dissection. Lab guide outlining the procedure for dissecting the sheeps heart. Obtain a preserved sheep heart and rinse it thoroughly in cold water to remove excess preservatives. Sheep heart dissection lab warren county public schools.
By examining a heart we can learn many different things like for. External view of the sheep heart with probes showing the opening to the vena cava and pulmonary vein. Learn about human anatomy by dissecting a sheep brain, heart, or cow eye. External anatomy most heart diagrams show the left atrium and ventricle on the right side of the diagram.