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PLACENTA
| Institution | University |
| Course | BACHELOR OF SCIENCE... |
| Year | 1st Year |
| Semester | Unknown |
| Posted By | stephen |
| File Type | |
| Pages | 15 Pages |
| File Size | 658.18 KB |
| Views | 1400 |
| Downloads | 0 |
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Description
The placenta is a temporary organ of pregnancy found in the uterus; formed from fetomaternal components facilitating the exchange of substances between the mother and the growing fetus. The placenta is a vital organ with multiple functions, such as endocrine, immune, and physiological.
Below is the document preview.
Development of Chorion and placenta
Fetal membranes are membranous/auxiliary
structures that surround or associated with vertebrate
embryo but do NOT take part in final embryo
formation.
Include:
1-Amnion.
2-Yolk sac.
3-Allantois.
4-Connecting stalk and umbilical cord.
5-Chorion
38 Pages
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10.11 MB
PLACENTA, FETAL MEMBRANES AND MULTIPLE GESTATION
DEVELOPMENT OF THE CHORIONIC SAC
• Trophoblast layer of the blastocyst
• Differentiation into: – Cytotrophoblast – inner layer – Syncytiotrophoblast – outer layer
• Development of extraembryonic mesoderm
• Formation of isolated lacunae spaces which later coalesce to form one big extraembryonic cavity – renamed chorionic sac
• Chorionic sac surrounds the amniotic cavity and primary umbilical vesicle
• Expansion of chorionic sac reduces the size of umbilical vesicle
130 Pages
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3.06 MB