sheep Heart Dissection lab assignment PDF

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complete lab no labels, first time doing this on my own. was nervous. i hope this helps you out as it did me....

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Sheep Heart Dissection

Sheep Heart Dissection Lab Report Precious Lyons Ivy Tech Community College

APHY 102-xx 9/11/2021

Sheep Heart Dissection

Abstract

In this lab we will be able to describe the sheep heart internally, externally,and all it’s structures. We will identify structures and functions in the heart. This lab will help gain a better understanding of the anatomy and physiology of the heart by dissecting it. During this lab we will use the scalpel and a probe to help us examine all of the structures. When we cut the heart, we can see the different layers, the internal structures such as the pericardium and epicardium. Then using our knowledge from this course, we will be able to imply the functions and finally we can help relate the sheep heart to the human heart. Through this experiment it will help us learn the structures of the sheep's heart visually and also help us imply how the human and sheep heart are similar. Keywords: Pericardium, Epicardium, Base, Apex, Right Auricle, Left Auricle, Right Ventricle, Left Ventricle, Pulmonary Trunk, Coronary Sulcus

Sheep Heart Dissection In this lab we will be identifying the external and internal structures of the sheep's heart. In a sheep's body or a human body, the heart functions as a muscular organ that helps pump oxygenated blood into the body. The heart has four chambers, the right and left atrium, and the right and left ventricles. The right and left atrium help receive the blood and the right and left ventricle help pump out the blood. While dissecting the sheep's heart we can learn the anatomy and physiology of the heart and it gives us a visual of the human heart.

Methods Let's first start off with all the materials we will need for this lab. To perform this lab correctly we will need a sheep heart, dissecting tools, dissecting tray, face mask, gloves, apron, and a bench coat pad. The first step for this lab is to focus on the examining part. First, look at the structures and identify the anterior surface of the heart. You will be able to see the pericardium, which is the layer that encloses the membrane of the heart. Next, you will be able to see the epicardium, the innermost layer of the pericardium, and the outer surface of the heart.

Sheep Heart Dissection

You will also see the base, posterior part formed by the atria and the apex or bottom of the heart. The right auricle will be visible and it will be attached to the heart's right atrium. The left auricle will be a flap-like look on the heart wall on the anterior surface of the left atrium. The pulmonary trunk will be a vessel that is close to the right ventricle and branches into the arteries which end at the lungs. You will be able to spot the right and left ventricles as well. After the anterior surface of the heart you can look at the posterior surface and you will be able to find the coronary sulcus, which is located in between the left and right ventricles. Now we will get into the inside of the heart and examine what isn't visible. First, you will insert a probe into the collapsed superior vena cava into the right atrium. You will push the probe in until the inferior vena cava. Once you have done that, with your scalpel you will make a coronal cut of the sheep heart. This cut will go through both the left and right auricles. Now you will be able to identify the myocardium, which is the middle layer of the heart wall. You can now see the endocardium, right atrium, right auricle, superior and inferior vena cava, coronary sinus opening, tricuspid valve, chordae tendineae, pulmonary semilunar valve, and the papillary muscles. Once you can clearly see all of the structures listed earlier, you can insert your probe into the right atrium. After finding an opening of the coronary sinus, insert the probe into that region and observe the movement taking place. Use your probe to examine the pulmonary trunk. Next make a longitudinal incision across the pulmonary trunk and look at the structures on the left side of the heart. Finally we can see the opening to the right and left coronary arteries. After examining all the structures, we can clean off the area by disposing of the heart and trash properly, cleaning and sanitizing our tools.

Results Having the heart cut open and visually available definitely helps with identifying the different structures and learning their functions. All the major structures were identified, and they were examined. Attached below are some pictures I took, which help understand the anatomy of the heart.

Sheep Heart Dissection...