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Developing embryo

Developing embryo

P680/0567

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Credit

PETER GARDINER / SCIENCE PHOTO LIBRARY PETER GARDINER / SCIENCE PHOTO LIBRARY

Caption

Developing embryo. Artwork showing the development of an embryo from the third week of development until it reaches the foetal stage (nine weeks). At the third week a process known as gastrulation occurs, forming three types of tissue known as germ layers; the endoderm, mesoderm and ectoderm. From 3-8 weeks these germ layers develop into tissues and organs. The nervous and vascular systems, gastrointestinal tract, skin, kidneys and respiratory system are formed. The embryo assumes a rounded body, its limbs and digits form and it develops a human-like face. The ninth week is the beginning of the foetal period. By now the foetus is 5-8 centimetres long and weighs 10-45 grams.

Release details

Model release not required. Property release not required.

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