An Alizarin stained human foetus
Numéro d’image : 11874830
| An Alizarin stained human fetus of about 14 weeks old showing the early development of bone (ossification). Bone formation begins at the end of the second month of pregnancy,continues through birth & up to adolescence. The fetal skeleton,with the exception of the skull & clavicle (which begin as bone),consists of cartilage. Beginning at eight weeks,sites of ossification appear (near the middle of the future bone) & spread outward replacing the cartilage. At birth the small bones of the hands & feet together with sites known as epiphyses (mainly ends of the limb bones),have still to be replaced by bone | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library |
| Taille de l’image : | 2480 px × 3750 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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