wolffian reproductive organ testis http://homosaurus.org/v2/testes http://id.loc.gov/authorities/subjects/sh85134157 http://purl.bioontology.org/ontology/MESH/D013737 http://purl.obolibrary.org/obo/NCIT_C12412 http://purl.obolibrary.org/obo/UBERON_0000473 http://purl.org/sig/ont/fma/fma7210 https://en.wikipedia.org/wiki/Testicle https://homosaurus.org/terms/testes RC898 QP255 QM416 A gonad that produces and releases sperm. QL878 A09.3.01.001 testikel The testes present as internal and external in different species. For example, the testes are external in humans and internal in elephants. testes testicle testicular gonad