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CROSS-SPECIES ANATOMY - ANNOTATIONS

The Basic subset of the UBERON integrated, cross-species anatomy ontology is downloaded weekly from http://berkeleybop.org/ontologies/uberon/basic.obo. For more information about this ontology see the "About" page on the UBERON website at http://uberon.github.io/about.html.
Term:vas deferens
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Accession:UBERON:0001000 term browser browse the term
Definition:A secretory duct that transports sperm from the testis. In mammals this is a continuation of the epididymis and ends in the prostatic urethra where it terminates to form ejaculatory duct.
Comment:[homology-note] "The continuation of the archinephric duct, now called the deferent duct, extends caudally to the cloaca or to the part of the mammalian urethra that is derived from the cloaca.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001135", ontology="VHOG", source="ISBN:978-0030223693 Liem KF, Bemis WE, Walker WF, Grande L, Functional Anatomy of the Vertebrates: An Evolutionary Perspective (2001) p.670", source="http://bgee.unil.ch/"}; [taxon-note] "Most vertebrates have some form of duct to transfer the sperm from the testes to the urethra. In cartilaginous fish and amphibians, sperm is carried through the archinephric duct, which also partially helps to transport urine from the kidneys. In teleosts, there is a distinct sperm duct, separate from the ureters, and often called the vas deferens, although probably not truly homologous with that in humans. In cartilaginous fishes, the part of the archinephric duct closest to the testis is coiled up to form an epididymis. Below this are a number of small glands secreting components of the seminal fluid. The final portion of the duct also receives ducts from the kidneys in most species. In amniotes, however, the archinephric duct has become a true vas deferens, and is used only for conducting sperm, never urine. As in cartilaginous fish, the upper part of the duct forms the epididymis. In many species, the vas deferens ends in a small sac for storing sperm. The only vertebrates to lack any structure resembling a vas deferens are the primitive jawless fishes, which release sperm directly into the body cavity, and then into the surrounding water through a simple opening in the body wall." xsd:string {source="WP"}
Synonyms:exact_synonym: deferent duct;   ductus deferens;   vas deferen
 related_synonym: sperm duct;   vasa deferentia
 xref: BTO:0001427;   CALOHA:TS-1105;   EFO:0000981;   EMAPA:18681;   EV:0100105;   FMA:19234;   GAID:404;   MA:0000413;   MESH:D014649;   MIAA:0000129;   NCI:C12813;   SCTID:245467009;   UMLS:C0042360;   VHOG:0001135;   Wikipedia:Vas_deferens;   galen:VasDeferens


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Term paths to the root
Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          lateral structure 0
            male genital duct 0
              vas deferens 0
                adventitia of ductus deferens 0
                ampullary gland 0
                deferent duct vein 0
                mucosa of deferent duct 0
                muscular coat of vas deferens 0
                vas deferens epithelium 0
Path 2
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          multicellular anatomical structure 0
            multicellular organism 0
              anatomical system 0
                reproductive system 0
                  reproductive structure 0
                    reproductive organ 0
                      internal genitalia 0
                        internal male genitalia 0
                          male genital duct 0
                            vas deferens 0
                              adventitia of ductus deferens 0
                              ampullary gland 0
                              deferent duct vein 0
                              mucosa of deferent duct 0
                              muscular coat of vas deferens 0
                              vas deferens epithelium 0
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