Angelo Ruffini (1864-1929) was an Italian histologist and embryologist. He spent his career at the University of Bologna and University of Siena. Histology is the microscopic study of tissues—their formation, structure and function. ... ... The University of Bologna (Italian: , UNIBO) is the oldest continually operating degree-granting university in the world, and the second biggest university in Italy. ... The University of Siena (Università di Siena, UNISI) in Tuscany is one of the older universities of Italy, founded in the 13th century, initially as a Studium. ...

He was the first to describe small encapsulated nerve endings (mechanoreceptors} which were to become known as Ruffini corpuscles. He used a gold chloride stain on his microscope slides in order for to view the tiny corpuscles. He was also a pioneer in the study of amphibian gastrulation, and he published his morphological and physiological embryonic findings in the journal Fisiogenia. A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion. ... Ruffini Endings are one of the four main cutaneous mechanoreceptors. ... Gold(III) chloride, traditionally called auric chloride, is one of the most common compounds of gold. ... Wikibooks Transwiki has more about this subject: Microscope slide Microscope slides and cover slips. ... Subclasses and Orders    Order Temnospondyli - extinct Subclass Lepospondyli - extinct Subclass Lissamphibia    Order Anura    Order Caudata    Order Gymnophiona Amphibians (class Amphibia; from Greek αμφις both and βιος life) are a taxon of animals that include all living tetrapods (four-legged vertebrates) that do not have amniotic eggs, are ectothermic (term for the animals... 1 - blastula, 2 - gastrula; orange - ectoderm, red - endoderm. ... The term morphology in biology refers to the outward appearance (shape, structure, colour, pattern) of an organism or taxon and its component parts. ... This article or section does not cite any references or sources. ... It has been suggested that embryology be merged into this article or section. ...