Which of the following vertebrate organs receive only oxygenated blood?
Spleen
Gills and lungs are respiratory organs that oxygenate deoxygenated blood. Hence receive deoxygenated blood also. Liver is associated with the portal venous system carrying deoxygenated blood and hence has deoxygenated blood flowing through it. Spleen gets blood only through the splenic artery and has no deoxygenated blood flowing into it.