A scanning electron microscopic study of the splenic sheathed vessel of the pig.

The morphology and function of the splenic sheath have been thoroughly discussed. Schweigger-Seidel (1863) first pointed out that a high permeability was seen on the wall of the sheathed vessel. Later some research workers who used color suspension materials for investigating the sheathed vessel have mentioned that the material leaked from the wall of the vessel into the sheath. Ohta (1957) described that the injected acryl plastic leaked from some spots of the sheathed capillary wall and displayed a definite route within the sheath under the light microscope. This paper will deal with the passageway within the sheath under the scanning electron microscope as a further study on his findings.