Figure 2
From: Number Density of Mast Cells in the Primo Nodes of Rats
Large-size OS-PN around the small intestine of a rat. (A) Cross section in the middle of the PN stained with toluidine blue after paraffin embedding (100×). The scale baris 100 µm. (B) Magnified view of the rectangular area (200×). The scale bar is 50 µm. The mast cells could clearly be distinguished from other cells by using toluidine blue staining. OS-PN = organ surface primo node; PN = primo node.