Placenta: Anatomía e Histología Comparada / Placenta: Compared Anatomy and Histology
Int. j. morphol
;
30(4): 1490-1496, dic. 2012. ilus
Article
in Spanish
| LILACS
| ID: lil-670169
RESUMEN
La placenta, anexo embrionario propio de los mamíferos placentados, imprescindible para la supervivencia embriofetal, está formada por la zona más superficial del endometrio y el corion, asociado con el saco vitelino o el alantoides, dependiendo de la especie. La placenta provee el intercambio gaseoso y nutricio entre la madre y el feto, secreta hormonas y posee propiedades inmunosupresoras. Existen diferentes criterios para clasificar la placenta; de acuerdo a la distribución de las vellosidades coriales de la placenta difusa, cotiledonaria, zonaria y discoidal; de acuerdo a las características histológicas de la placenta epiteliocorial, sindesmocorial, endoteliocorial y hemocorial.
ABSTRACT
The placenta is an extraembryonic membrane of placental mammals, essential for embryo survival. It is formed by the most superficial zone of the endometrium and the chorion, associated with the yolk sac or allantois, depending on the species. The placenta provides gas and nutrient exchange between mother and fetus, secretes hormones and has immunosuppressive properties. There are different criteria to classify the placenta; i. e. according to the distribution of the chorionic villi of the placenta diffuse, cotyledonary, zonaria and discoidal; according to the histological characteristics of the placenta epitheliochorial, syndesmochorial, endotheliochorial and hemocorial.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Placenta
/
Anatomy, Comparative
Limits:
Animals
/
Female
/
Humans
Language:
Spanish
Journal:
Int. j. morphol
Journal subject:
Anatomy
Year:
2012
Type:
Article
Affiliation country:
Chile
Institution/Affiliation country:
Universidad de Chile/CL
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