Heart pericardium surface, SEM

Bildnummer 12298045
Heart pericardium surface, SEM
Surface of the heart pericardium, coloured scanning electron micrograph (SEM). The pericardium is a double-walled, membranous sac surrounding the heart. The pericardium has a tough outer fibrous layer (fibrous pericardium) and a delicate serous layer (serous pericardium). Shown here is the outer surface of the fibrous pericardium that is composed of connective tissue (fibronectin, collagen and laminin). Flattened squamous epithelial cells (from the upper serous layer) can be seen protruding through the fibrous pericardial layer. The inner serous pericardial layer is the wall adjacent to the heart (not seen). It is split into two layers, the epicardium (just above the heart) and the parietal layer. Between the two layers is the pericardial cavity, which contains serous fluid. Both layers consist of flattened squamous epithelial cells. The serous pericardium lubricates the heart, preventing friction. Magnification: x5, 000 when shortest axis printed at
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / DENNIS KUNKEL MICROSCOPY
Bildgröße: 2646 px × 3302 px
Modell-Rechte: nicht erforderlich
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