Fig. 4.

Layered epicardial elastin network in the middle region of the left ventricle. Projections and normalized fiber distributions were obtained from the locations of middle anterior M1 (A) and M2 (B), middle lateral M3 (C), and middle posterior M4 (D). Top panel: projections of the first 15 μm thick layer (the surface into the 15 μm deep of the sample); middle panel: projections the last 15 μm thick layer (the last 15 μm into the opposite side of the surface); bottom panel: projections of the full thickness of the sample. Scale bar = 100 μm.