Human term placenta, light micrograph. There are a great quantity of very small chorionic villi (chorion frondosum) with dark syncytial knots (clumps of syncytial nuclei) and pink fibrinoid necrosis. The foetal blood vessels are very enlarged.

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Photo credit: © JOSE CALVO / SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: -, anatomical, anatomy, biological, biology, chorionic, cytotrophoblast, development, embryo, endometrium, female, genital, haematoxylin, healthy, hematoxylin, histological, histology, human, light, lm, micrograph, microscopy, normal, placenta, reproductive, syncytiotrophoblast, system, tissue, uterus, villi