Venen

Microcirculation of the Rat Pancreas, with Special Reference to the Insulo-Acinar Portal and Insulo-Venous Drainage Systems: A Further Scanning Electron Microscope Study of Corrosion Casts.

“…It is generally believed that the branches of the hepatic portal vein are provided with no valves (BENNINGHOFF, 1930;HEBEL and STROMBERG,1976). However, as shown above, marked V-shaped impressions were at times noted in the interlobular veins in rat pancreas, suggesting the occurrence of venous valves.…”

Endothelial cells and “cement” lines

“…Endothelial lines have also been stained by the prussian-blue reaction (Arnold, 1876 ;Sinapius, 1956) and with mercuric sulphide (Sinapius, 1956). Another stain which has been claimed to show up these lines is Heidenhain's iron-hzematoxylin (Benninghoff, 1930). Although he used this stain, Efskind's (1941) published illustrations of the aortic endothelium of rabbits do not show a pattern of lines.…”

Extrinsic and intrinsic blood supply and histomorphological changes associated with age in the cerebral arteries and brain nuclei in dog (Canis familiaris) and pig (Sus scrofa domestica)

“…Ranke (I915), Hackel (1928), and Benninghoff (1930) studied the cerebral arteries and found that internal elastic lamina became laminated early in life. They observed that the elastic tissue did not increase but was replaced by con nective tissue which appeared in the spaces left by the de generated elastic tissue.…”

“…He described the adventitia as a delicate layer of connective tissue which was not at tached to the muscle layer, Binswanger and Schaxel (1917) studied the normal histology of the cerebral arteries and inferred that the small cerebral arteries differed from the larger ones by having less elastic tissue in their media. Hackel (1928) observed that there was no external elas tic lamina, the adventitia was small but the internal elas tic lamina was thicker than the other systemic arteries, Benninghoff (1930) described the internal elastic lamina as the fenestrated membrane. Ranke (1915) believed that the internal elastic lamina was not a layer but a mesenchymal network which was continuous from the subendothelium to the adventitia.…”