Image Collection: Medical Anatomy and Illustrations
- All (559)
- Allergic Skin Disorders (31)
- Viral Skin Diseases (26)
- Bacterial Skin Diseases (29)
- Fungal Skin Diseases (17)
- Bites and Infestations (27)
- Noncancerous, Precancerous and Cancerous Tumors (56)
- Diseases of Pigment (26)
- Papules, Scales, Plaques and Eruptions (47)
- Vascular, Lymphatic and Systemic Conditions (48)
- Scalp, Hair and Nails (26)
- Pregnancy Stages (9)
9. Picture of Pericardial Sac
Pericardial sac: A conical sac of fibrous tissue which surrounds the heart and the roots of the great blood vessels. Also called the pericardium.
The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the sternum (breastbone). The inner coat is double with one layer closely adherent to the heart while the other lines the inner surface of the outer coat with the intervening space being filled with fluid.
This small amount of fluid, the pericardial fluid, acts as a lubricant to allow normal heart movement within the chest.
The word "pericardium" means around the heart. The outer layer of the pericardium is called the parietal pericardium. The inner part of the pericardium that closely envelops the heart is called the visceral pericardium or epicardium.
Text: MedicineNet, Inc.
Guide to understanding the Image Gallery categories: