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Home > All Images > 1997 > August > 19 Aug 1997

Images Dated 19th August 1997

Choose from 11 pictures in our Images Dated 19th August 1997 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Coloured SEM of a hatching blastocyst 5 days old Featured 19 Aug 1997 Image

Coloured SEM of a hatching blastocyst 5 days old

Hatching blastocyst embryo. Coloured scanning electron micrograph (SEM) of a human embryo at the blastocyst stage, five days after fertilisation. It is seen at right hatching from a hole in the zona pellucida (at left), a protein shell that originally surrounded the unfertilised egg. The blastocyst is a hollow ball of cells with a fluid centre. Each cell is called a blastomere. Most of these embryo cells will form the placenta and membranes around the embryo, and only a small group (the inner mass) form the embryo proper. At this stage the blastocyst has moved into the uterus (womb) and is preparing to implant on the womb wall. Magnification: x360 at 6x7cm size. Magnification; x1, 200 at 8x10 inch size

© DR YORGOS NIKAS/SCIENCE PHOTO LIBRARY