https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13981673Edit ImageSaveSaveEditCropCustom TextFrogs: eleven figures showing the skeleton, circulatory system, and stages of development of the frog. Chromolithograph by H.J. Ruprecht, 1877.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 856 x 1200 px | 300 dpiLarge JPEG 2406 x 3372 px | 300 dpiFree DownloadFrogs: eleven figures showing the skeleton, circulatory system, and stages of development of the frog. Chromolithograph by H.J. Ruprecht, 1877.More