https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8764796Edit ImageSaveSaveEditCropCustom TextOpen-heart surgery, NIH, 1955. Original public domain image from FlickrMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGSmall JPEG 1200 x 943 px | 300 dpiLarge JPEG 2682 x 2108 px | 300 dpiFree DownloadOpen-heart surgery, NIH, 1955. Original public domain image from FlickrMore