Joseph von Gerlach

Joseph von Gerlach (1820–1896) was a German professor of anatomy at the University of Erlangen.

the finest divisions of the protoplasmic processes ultimately take part in the formation of the fine nerve fibre network which I consider to be an essential constituent of the gray matter of the spinal cord. The divisions are none other than the beginnings of this nerve fibre net. The cells of the gray matter are therefore doubly connected by means the nerve process which becomes the axis fibre and through the finest branches of the protoplasmic processes which become a part of the fine nerve fibre net of the gray matter.

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Gerlach was one of the first physicians to use microphotography for medical research. In 1863 he published a handbook titled Die Photographie als Hilfsmittel mikroskopischer Forschung (engl. Photography as a tool in microscopic science) in which he discusses the practical and technological aspects of microscopic photography. Also the eponymous Gerlach's valve (valvula processus vermiformis) is named after him; this anatomical structure is a fold of membrane at the opening into the caecum of the canal of the vermiform appendix. In his article Ueber das Hautathmen^[1] (engl. On skin respiration) he was the first to show that human skin uses oxygen from ambient air.

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