Health Education Assets Library (HEAL)
 
Filters: Collection: ehsl_heal
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TitleDescriptionSubjectCollection
26 Survey of implanted blastocyst (human, ca. 3 weeks-old embryo) and detail of advanced stage of decidua cells (human, mid pregnancy)Stain: Hematoxylin-eosin (A, left) and Azan (B, right). (A) Left: section through a slightly damaged implantation site shows at (1) the uterine lumen and (2) the decidua capsularis while at (3) several uterine glands are visible. At arrow (4) the amniotic cavity, (5) points to embryonic shield and...placenta; uterus; syncytiotrophoblast; implantation; blastocystPoja Histology Collection - Placenta
27 Survey of the chorionic plate and intervillous space (human placenta, full-term)Stain: Perjodic acid-Schiff reaction (PAS). At the top the chorionic plate (1) with cross-sections of umbilical vessels (2) At (3) the folded amnion covering the chorionic plate. Ramifications of thicker stem villi demonstrate free-floating terminal villi (tertiary). At several places reddish-st...placenta; tertiary villi; decidua; chorionic platePoja Histology Collection - Placenta
28 Survey of the intervillous space with villi (human placenta, full-term)Stain: Perjodic Acid Schiff reaction (PAS). At the right and left side the chorionic plate (1) with few cross-sectioned umbilical vessels (2), at (3) a detached amnion. Cross-sections of thick stem villi (4) at the fetal side ramify into terminal villi (tertiary) that are found stuffed (due to fix...placenta; stem villus; syncytiotrophoblast; amnionPoja Histology Collection - Placenta
29 Surveys/detail of the decidua basalis and intervillous space of the placenta (human placenta, late midpregnancy)Stain: Hematoxylin ?azophloxine (A, C), Trichrome (Goldner) (B). Left pictures (A, B): The maternal side at the bottom consists of a broad zone of the stripped basal decidua (1) intermingled with reddish matrix-type fibrinoid accumulations and streaks (Rohr) (2), close to the anchoring villi (3) an...placenta; chorionic villi; fibrinoid; trophoblast shellPoja Histology Collection - Placenta
30 Syncytiotrophoblast cells of tertiary villi (human placenta, midpregnancy)(A) Left: stain: Immunoperoxidase staining with diaminobenzidin (DAB) and human anti-chorionic gonadotrophin antibody (hCG-DAKO 231), counterstained with hematoxylin. (B) Right: electron microscopy. (A) At the left the exclusive reactivity (dark brown) in the cytoplasma of the multinucleated syn...Syncytiotrophoblast; placenta ; chorionic villi; HCG; immunohistochemistry; electron microscopyPoja Histology Collection - Placenta
31 Tertiary villi (human placenta, early pregnancy)Stain: (A, left) Azan. (B, right) Immunoperoxidase staining with diaminobenzidin (DAB) and hematoxylin counterstaining for human anti-chorionic gonadotrophin (hCG-DAKO 231 antibody). (A) shows blue grey-stained postmitotic multinucleated syncytiotrophoblast cells (STC, 1b), partially cut tangential...placenta; chorionic villi; placental barrier; HCGPoja Histology Collection - Placenta
32 Tertiary villi (human placenta, full-term, cross-section)Stain: Hematoxylin ? azophloxine. A few tertiary villi (1) within the intervillous space (2) contains capillary (3) and embryonic connective tissue (*). It remains covered by the postmitotic multinucleated syncytiotrophoblast cell (STC, 4). Distinct nuclear accumulation in the STC indicates the so-c...placenta; tertiary villi; syncytiotrophoblastPoja Histology Collection - Placenta
33 Tertiary villi (human placenta, full-term, cross-sectioned)Stain: Hematoxylin-azophloxine. The central villus is lined by epithelial multinucleated syncytiotrophoblast cells (1) and sparsely light-stained cytotrophoblast cells (Langhans, (2)). The fetal stroma contains vessels and mostly fibroblasts, note capillaries (3) in close association with the epithe...placenta; tertiary villus; syncytiotrophoblastPoja Histology Collection - Placenta
34 Tertiary villi (human placenta, late midpregnancy): (A) Left: stain: Hematoxylin - azophloxine. (B) Right: electron microscopy (low magnification). At the left (A) multinucleated syncytiotrophoblast cells (STCs, 1) and vaguely cytotrophoblast cells (CTCs, 2) cover the loose fetal stroma (4). A large and a small arteriole (3) are embedded with stro...placenta; tertiary villi; placental barrier; Hofbauer cell; vasculosyncytial membrane; syncytiotrophoblastPoja Histology Collection - Placenta
35 Tertiary villi (human placenta, midpregnancy)(A) Lower and (B) higher magnification. Stain: Hematoxylin - azophloxine. (C) electron microscopy of Hofbauer cell. (A, B) show tertiary villi and intervillous spaces. Squeezed between villi fibrinoid clots (1). The large arrow (2) points to either a detached, free circulating large STC (syncyt...placenta; chorionic villi; Hofbauer cell; fibrinoid; syncytiotrophoblastPoja Histology Collection - Placenta
36 Tertiary villi (human placenta, midpregnancy)Stain: Hematoxylin - azophloxine. (A) Left a variety of tertiary villi and reddish-stained fibrinoid depositions (1). At (2): the embryonic connective tissue starts to fibrinize. Note syncytiotrophoblast knots (3) or sprouts of several villi .These knots might represent aggregations of degenerati...placenta; fibrinoid; cytotrophoblast; syncytiotrophoblastPoja Histology Collection - Placenta
37 Trophoblast cell in lung alveolar interstitium (human, early midpregnancy)Stain: Hematoxylin-eosin. It is well known that free circulating trophoblast cells can be found migrated into lung parenchyma during normal pregnancy. In this sample a large trophoblast cell (→) is localised within the normal alveolar interstitium. Alveolar phagocytes (*) are present in the alve...placenta; trophoblast; lungPoja Histology Collection - Placenta
38 Villi of complete hydatidiform mole (human)(A) Macroscopy aggregation (1) of abnormal villi of hydatidiform mole intermingled with blood clots (2). (B) After dissection of a complete mole grape-like aggregations of dilated chorionic villi are presented as numerous liquid-filled vesicles (1) varying in diameters (from few mm up to 1 cm) surr...placenta; trophoblast; hydatiform molePoja Histology Collection - Placenta
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