The anatomy of the frog

"The anatomy of the frog" by Alexander Ecker is a scientific anatomical treatise written in the late 19th century. It presents a thorough, illustration-rich description of frog anatomy—especially the European species most used in laboratories—organized by systems (skeleton, muscles, nerves, vessels, viscera, skin, and sense organs) for the needs of physiologists and students. The English edition expands the original with annotations, recent research, and many additional figures. The opening of this treatise explains that the translator has revised and enlarged the work, adding modern findings, original observations, and over a hundred new illustrations, while acknowledging collaborators and sources. Ecker’s own prefaces state the book’s aim as a descriptive anatomy of native frogs (not a comparative or developmental study), emphasize its role as a practical basis for further research, and note assistance on the nervous system and later parts. The introduction justifies the frog’s central role in physiology, briefly surveying landmark discoveries (from muscle–nerve experiments and galvanism to capillary circulation and blood studies) and then narrows the subject to European frogs, chiefly Rana esculenta and Rana temporaria, with clear diagnostic differences in head shape, tympanum, dentition, vocal sacs, limb proportions, webbing, skin ridges, and coloration; a third form (Rana oxyrhinus) and possible hybrids are also noted.

The anatomy of the frog, by Alexander Ecker. Republished by OpenStories from Project Gutenberg eBook #77560.