Figure 1
From: Mesothelial Cells Covering the Surface of Primo Vascular System Tissue
Hematoxylin and eosin staining of sectional (4 µm in thickness) micrographs of the organ surface primo vascular system (PVS) tissue. (A1 and A2) PVS tissues composed of primo nodes (PNs, arrows) and primo vessels (PVs, arrowheads) on the surface of the small intestine (A1) and liver (A2). (A3) The same PVS tissue samples in saline. [PN: (A1), 0.60 × 0.44 mm; (A2), 1.24 × 0.45 mm]. Scale bars: 1 mm. (B1 and C1) Cross section of a PN (B1) and longitudinal section of a PV (C1). Note the dark nuclei covering the border (gray arrows). Scale bars: 100 µm. (B2 and C2) Magnified view [squares in (B1) and (C1)] showing flattened nuclei of the cells (arrows) located along the boundary of a PN (B2) and PV (C2). There are mast cells (open arrows), white blood cells (open arrowheads), red blood cells (circles) inside the PN and PV. Scale bars: 20 µm. (B3 and C3) Magnified view [squares in (B2) and (C2)] showing cucumber-like nuclei (arrows) on the thin basement membranes (arrowheads) in the PN (B3) and PV (C3). Scale bars: 5 µm.