With a scalpel, cut across a section of the aorta and a section of the vena cava. Cut downward along the pulmonary artery around the wall of the right atrium and upward along the right of the superior vena cava. Careful dissecting techniques will be needed to observe all the structures and their connections to other structures.
Using the available material, instructions and diagrams, most students will be able to locate many structures for themselves.
Double injected refers to the arteries being filled with a red latex, and the veins being filled with blue latex. Two of those chambers are receiving chambers called the right and left atrium. Follow the cutting diagram below very carefully to study the anatomy of the left side of the heart.
With tweezers, carefully lift the resulting flap to expose the structures underneath. Dispose of your materials according to the directions from your teacher.
The oxygenated blood then flows from the lungs to the left atrium through the pulmonary veins. You will not need to use a scalpel. Then it goes from there to the right ventricle to the pulmonary arteries.
Systemic circulation begins in the left ventricle and ends in the right atrium. Begin to cut on line 6 on the left atrium where cut 4 began. Locate the mitral valve between the left atrium and ventricles.
These valves control the flow of blood into and out of each chamber in the heart. These arteries lead to the lungs where blood is then oxygenated. The left ventricle then contracts and forces the blood through the aorta, which provides the rest of the body with blood. Therefore, for every structure seen, you should determine the following: The many valves such as the tricuspid and mitral valves control the flow of blood from each chamber.
Always raise structures to be cut with your forceps before cutting, so that you can see exactly what is underneath and where the incision should be made. The blood then flows down to the left ventricle.
With the heart on the ventral side facing you and the apex pointing downwards, cut along line 1. Compare the thickness of their walls. In what chambers of the heart does pulmonary circulation begin and end? Keep in mind that dissecting does not mean "to cut up"; in fact, it means "to expose to view".
Turn the heart over to locate the pulmonary veins. As the leading theme of this lab, ask yourself: Following the cutting diagram below study the anatomy of the right side of the heart.
You are expected to have exhausted all possibilities in attempting to located structures before asking for assistance. Cut along line 2 and extend the cut upward toward the pulmonary artery. The efficiency in the cycle of blood depends on the sequential contraction of the atriums and ventricles.
Blood flow through the heart starts when the right atrium takes the blood that flows in through the superior or inferior vena cava. The similarity of structures among related organisms shows evidence of common ancestry.
The path of blood starts from the superior or inferior vena cava to the right atrium. You will notice various incisions on the external surface of the rat where the latex was injected.
Their specific layout within the body contributes to making certain functions possible.
The blood then travels from there to the aorta and leaves the body. Contrary to popular belief, a scalpel is not the best tool for dissection.
What organ system it belongs to How it relates to other components Its general function Its specific function if applicable Dissection Dissecting tools will be used to open the body cavity of the rat and observe the structures.
You are expected to follow the directions in this lab.Dissection Dissecting tools will be used to open the body cavity of the rat and observe the structures. Keep in mind that dissecting does not mean "to cut up"; in fact, it means "to expose to view". Sheep Heart Dissection Lab Report.
Sheep Heart Dissection. Introduction. In this investigation, the external and internal structures of a sheep’s heart was examined and identified by dissection. The heart is a muscle that pumps oxygenated blood and nutrients throughout the body.
A sheep’s heart has four chambers like most mammals. Lab 11 Overview of Phylum Chordata Introduction do not need to report on these in your lab summary.
But you should record Dissection 1. Examine the external anatomy of a preserved frog specimen noting the following features: mouth, eye, nares.
The Echinoderms The echinoderms (phylum Echinodermata) are coelomate deuterostomes. All echinoderms are These organs are very easily damaged during dissection, but take note of The chordates (phylum Chordata) are coelomate deuterostomes with closed circulatory.
Chordate Dissection Report Essay Chordate Dissection and Anatomy In this lab, a dissection was performed on a mouse, a frog, and a dogfish shark, and the anatomy was observed and noted.
The three animals have some similarities and differences. Free Essay: Chordate Dissection and Anatomy In this lab, a dissection was performed on a mouse, a frog, and a dogfish shark, and the anatomy was observed and.Download