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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:ossification center
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Accession:UBERON:0010355 term browser browse the term
Definition:The first step in ossification of the cartilage is that the cartilage cells, at the point where ossification is commencing and which is termed a ossification center, enlarge and arrange themselves in rows. The matrix in which they are imbedded increases in quantity, so that the cells become further separated from each other. A deposit of calcareous material now takes place in this matrix, between the rows of cells, so that they become separated from each other by longitudinal columns of calcified matrix, presenting a granular and opaque appearance. Here and there the matrix between two cells of the same row also becomes calcified, and transverse bars of calcified substance stretch across from one calcareous column to another. Thus there are longitudinal groups of the cartilage cells enclosed in oblong cavities, the walls of which are formed of calcified matrix which cuts off all nutrition from the cells; the cells, in consequence, atrophy, leaving spaces called the primary areolC&.
Synonyms:exact_synonym: ossification centre
 related_synonym: center of ossification;   centrum ossificationis
 xref: FMA:75436;   Wikipedia:Ossification_center


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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
          multicellular anatomical structure 0
            organ part 0
              zone of organ 0
                zone of bone organ 0
                  ossification center 0
                    alisphenoid ossification center + 0
                    orbitosphenoid ossification center + 0
                    primary ossification center 0
                    secondary ossification center 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
                musculoskeletal system 0
                  skeletal system 0
                    skeletal element 0
                      bone element 0
                        zone of bone organ 0
                          ossification center 0
                            alisphenoid ossification center + 0
                            orbitosphenoid ossification center + 0
                            primary ossification center 0
                            secondary ossification center 0
paths to the root