Photograph of a section of a foetal hand showing ossification sites at the centre of the metacarpals & phalanges (speckled areas). Human bones are preformed in cartilage (clear areas),forming a soft tissue model,which is later converted into hard osseous tissue. Osteogenesis begins,usually,in a central position (as here) & spreads throughout the skeleton,transforming the cartilage to bone. This process begins during embryonic life & continues through the growing period of the child | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 3500 px × 5236 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |