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Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology...
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Transcript of Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology...
![Page 1: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/1.jpg)
Decidua, chorion, placenta, umbilical cord.
Doc. MUDr. Marie Jirkovská, CSc.
Institute of Histology and Embryology
![Page 2: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/2.jpg)
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Deciduaendometrium in pregnancy- decidua basalis - pars materna placentae
(endometrium)
schema
secretory phase
decidual cells
![Page 3: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/3.jpg)
Chorion
B.M.Carlson: Human Embryology and Developmental Biology, 1999
Decidua basalis
![Page 4: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/4.jpg)
Chorionic villi primary (P) secondary (S) tertiary (T)
P
PS
syncytiotrophoblast
cytotrophoblast
capillary
Hofbauer‘s cells
![Page 5: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/5.jpg)
ChorionS - syncytiotrophoblast, C - cytotrophoblast, M - mesenchyme,
H - Hofbauer cells
H
M
C
S
![Page 6: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/6.jpg)
Chorionic villi *proliferation and migration of cytotrophoblast, C – cytotrophoblast shell, V – chorionic villus, D - decidua
*
*
V
V
CC
D
![Page 7: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/7.jpg)
Relationship of decidua and chorion
![Page 8: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/8.jpg)
Human placenta at termDiscoid (diameter 15 – 20 cm, thickness 2 – 3 cm) – according shapeHemochorial villous – according structure Placenta consists of: fetal part (villous chorion) and maternal part (decidua basalis)
cotyledons
![Page 9: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/9.jpg)
Human placenta at term – a scheme
Fetal part: chorionic plate and cotyledons consisting of one or more main stem villi and their branches.Maternal part: decidual plate is covered by syncytiotrophoblast, contains decidual cells and remnants of the cytotrophoblastic shell.
![Page 10: Decidua, chorion, placenta, umbilical cord. Doc. MUDr. Marie Jirkovská, CSc. Institute of Histology and Embryology.](https://reader035.fdocuments.net/reader035/viewer/2022081503/56649cc05503460f949877d5/html5/thumbnails/10.jpg)
Placenta at low magnification
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Stem and intermediate villi
Fibrinoid – eosinophilic mass on the surface of villi, decidua basalis and chorionic plate (material composed of fibrin from maternal blood and degenerated cells).
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Placenta
Terminal villi Placental septum
syncytiotrophoblast
vasculosyncytial membrane
cytotrophoblast decidual cell
capillary
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3-D reconstruction of the villous capillary bed
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Umbilical cordlength cca 50 cm
A – a. umbilicalis, V – v. umbilicalis, E – ectoderm of the amnion, W – Wharton‘s jelly
VA
W
E
E
W
A
V