ACTIVITY 21.1 Examining the Organization of the Pericardium The heart is enclosed by a membranous sac called the pericar

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Activity 21 1 Examining The Organization Of The Pericardium The Heart Is Enclosed By A Membranous Sac Called The Pericar 1 (47.39 KiB) Viewed 76 times

ACTIVITY 21.1 Examining the Organization of the Pericardium The heart is enclosed by a membranous sac called the pericardium. This structure consists of two parts. The outer fibrous pericardium is a tough, connective tissue layer. The inner serous pericardium is a delicate serous membrane that forms a double-layered sac around the heart. 374 You can demonstrate the organization of the pericardium by pushing your fist into a plastic bag Close off the open end of a large, clear plastic bag with masking tape. Push your fist into the wall of the plastic bag as shown in the diagram to the right. Notice that your fist is covered by two layers of plastic with a space between the two layers. Your fist represents the heart. The plastic bag represents the two layers of the serous pericardium The inner plastic layer corresponds to the visceral pericardium, which is in contact with the heart wall The outer plastic layer corresponds to the parietal pericardium. EXERCISE 21 Gross Anatomy of the Heart Your wrist represents the base of the heart. Notice that the two layers of plastic are continuous with each other at this position in other words, the visceral pericardium is continuous with the parietal pericardium where the great blood vessels are connected to the heart. The space between the two layers of plastic represents the pericardial cavity Wrap a layer of cotton or cheesecloth over the outer plastic layer (the parietal pericardium). This layer represents the fibrous pericardium, which is used to connective tissue that surrounds adjacent structures. On a torso model identify three structures that are adjacent to the heart Write the names of the structures below.