Fibrous sac that encloses the heart.
Membraneous fibroserous sac enclosing the heart; the outer layer.
The thin outer layer of tissue that encloses or covers the heart.
The sac containing the heart.
A membrane which surrounds and supports the heart.
Double-layered sac surrounding the heart and large vessels entering and leaving the heart. The inner serous pericardium contains a layer that adheres to the surface of the heart and a layer that lines the inside of the outer, fibrous pericardium. The fibrous pericardium is tough and comparatively inelastic; it protects the heart and inner membranes. Between the two layers is the pericardial space, containing pericardial fluid that lubricates the membrane surfaces and allows easier heart movement.
The sac that encloses the heart and the origin of the large blood vessels leading into and out of the heart. The pericardium has a thick, protective outer bag (called the fibrous pericardium) that keeps the constantly moving heart in position. Within that is an inner sac of membrane (the serous pericardium) that has two layers. The outer layer is separated from the inner layer by a cushion of lubricating fluid. The thin, inner layer secretes this fluid and is a smooth lining that allows the heart to move without friction as it beats.
The membrane surrounding the heart, consisting of two portions. The outer fibrous pericardium completely encloses he heart and is attached to the large blood vessels emerging from the heart. The internal serous pericardium is a closed sac of serous membrane: the inner visceral portion {epicardium) is closely attached to the muscular heart wall and the outer parietal portion lines the fibrous pericardium. Within the sac is a very small amount of fluid, which prevents friction as the two surfaces slide over one another as the heart beats.
The smooth membrane that surrounds the heart.
The membranous fibroserous sac enclosing the heart and the bases of the great vessels: Its three layers are the fibrous pericardium (the outer layer); the parietal pericardium, a serous membrane that lines the fibrous pericardium; and the visceral pericardium (epicardium), a serous membrane on the surface of the myocardium. The space between the two serous layers is the pericardial cavity, a potential space filled with serous fluid that reduces friction as the heart beats. Its base is attached to the diaphragm, its apex extending upward as far as the first subdivision of the great blood vessels. It is attached in front to the sternum, laterally to the mediastinal pleura, and posteriorly to the esophagus, trachea, and principal bronchi.
Double-layered membranous sac enclosing the heart; made of epithelial tissue.
The pericardium, a delicate and sac-like membrane, envelops the heart. It comprises two distinct layers: the serous pericardium and the fibrous pericardium.
The membranous sac enveloping the heart and the bases of the major blood vessels arising from it.
The pericardium consists of two layers. The outer layer is rigid, non-flexible, and fibrous. It connects to the diaphragm below and the sternum (breastbone) in the front. The inner layer is divided into two sheets: the innermost sheet is firmly connected to the heart, while the outer sheet is connected to the fibrous layer. The smooth inner surfaces of these sheets are divided by a cavity known as the pericardial space, which holds a small quantity of fluid to lubricate the heart.
The heart is enveloped by a two-layered membranous sac. The inner layer, known as the visceral pericardium, is a serous membrane. In contrast, the outer layer, called the parietal pericardium, is a fibrous membrane.