

Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
An in-depth exploration of the structures and functions of the mature placenta in human development, starting from week 9. It covers the key structures of the placenta, including the chorionic villi, amniotic membrane, and decidua, as well as the placental anatomy and physiologic roles. The document also discusses the placental blood barrier and the exceptions to it, known as the torch rule.
What you will learn
Typology: Study notes
1 / 3
This page cannot be seen from the preview
Don't miss anything!
see,^ The human placenta is chorionic villi* provide the surfaces for exchange of materials, and, therefore, are the functional units of the^ hemochorial ; that is, it allows direct contact between maternal blood and fetal tissues. As we'll placenta.
Week 9 Differential growth and regression of the chorionic villi initiates formation of the mature placenta. Key Structures:
Week 20 Expansion of the embryo pushes these layers against each other, leading to fusion and the formation of the mature placenta; a mucous plug blocks the cervical opening. Embryonic Pole:
Placental anatomy Growth of the fetus is driven by dynamic interactions between the mother and fetus. In healthy pregnancies, both fetal and maternal needs are met by physiological processes that operate for mutual benefit. However, when maternal healthis poor, physiological compromises are made that put the mother and/or fetus at greater risk. The placenta serves as an interface between maternal and fetal environments.
Recall that the intervillous spaces are derived from connections formed between the synctiotrophoblast and maternalsinusoids during early embryonic development.
Another important role of the placenta is hormone production, including:
Placental Blood Barrier The placenta prohibits passage of many pathogens from the mother to the fetus.