BGDA Practical Placenta - Placental Functions: Difference between revisions
From Embryology
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* electrolytes | * electrolytes | ||
* maternal antibodies | * maternal antibodies | ||
** maternal IgG antibodies are transferred from about week 13 (GA) across the placenta | |||
** from the maternal lacunae syncytiotrophoblast cell endosomes bind IgG through neonatal Fc receptors. | |||
* waste products - urea, uric acid, bilirubin | * waste products - urea, uric acid, bilirubin | ||
* drugs and their metabolites (fetal drug addiction) | * drugs and their metabolites (fetal drug addiction) |
Revision as of 12:38, 4 June 2012
Practical 14: Implantation and Early Placentation | Villi Development | Maternal Decidua | Cord Development | Placental Functions | Diagnostic Techniques | Abnormalities |
Term Placenta
Exchange
- oxygen, carbon dioxide, carbon monoxide
- water, glucose, vitamins
- hormones, mainly steroid not protein
- electrolytes
- maternal antibodies
- maternal IgG antibodies are transferred from about week 13 (GA) across the placenta
- from the maternal lacunae syncytiotrophoblast cell endosomes bind IgG through neonatal Fc receptors.
- waste products - urea, uric acid, bilirubin
- drugs and their metabolites (fetal drug addiction)
- infectious agents (cytomegalovirus, rubella, measles, microorganisms)
Endocrine
Protein and steroid hormones.
- Human chorionic gonadotrophin (hCG) - like leutenizing hormone, supports corpus luteum in ovary, pregnant state rather than menstrual, maternal urine in some pregnancy testing
- Human chorionic somatommotropin (hCS) - or placental lactogen stimulate (maternal) mammary development
- rise through pregnancy, stimulates maternal metabolic processes, breast growth
- Human chorionic thyrotropin (hCT)
- Human chorionic corticotropin (hCACTH)
- Relaxin
- Steroid Hormones - progesterone (maintains pregnancy), estrogens (fetal adrenal/placenta)
Placental Metabolism
Synthesises - glycogen, cholesterol, fatty acids
- provides nutrient and energy
Terms
BGDA: Lecture 1 | Lecture 2 | Practical 3 | Practical 6 | Practical 12 | Lecture Neural | Practical 14 | Histology Support - Female | Male | Tutorial
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Cite this page: Hill, M.A. (2024, May 2) Embryology BGDA Practical Placenta - Placental Functions. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDA_Practical_Placenta_-_Placental_Functions
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G