placenta development
Sign in to saveAlso known as GO:0001890, placenta developments, placental development, Placentation, placentation
Placentation is the formation, type and structure, or modes of arrangement of the placenta. The function of placentation is to transfer nutrients, respiratory gases, and water from maternal tissue to a growing embryo, and in some instances to remove waste from the embryo. Placentation is best known in live-bearing mammals (Theria), but also occurs in some fish, reptiles, amphibians, a diversity of invertebrates, and flowering plants. In vertebrates, placentas have evolved more than 100 times independently, with the majority of these instances occurring in squamate reptiles.
Key facts
- Embryology.Name
- Placentation
- Embryology.Latin
- placentatio
- Embryology.Image
- Placentation.svg
- Embryology.Caption
- Placentation in the human resulting from cleavage at various gestational ages
via Wikipedia infobox
Research
28,318 papers- Human placenta and trophoblast development: key molecular mechanisms and model systems.Cellular and molecular life sciences : CMLS · 2019
- Placenta accreta spectrum: pathophysiology and evidence-based anatomy for prenatal ultrasound imaging.American journal of obstetrics and gynecology · 2018
- The placenta in fetal growth restriction: What is going wrong?Placenta · 2020
- Tracking placental development in health and disease.Nature reviews. Endocrinology · 2020
- Early human trophoblast development: from morphology to function.Cellular and molecular life sciences : CMLS · 2022
via PubMed
Wikidata facts
Show 2 more facts
- native label
- placentatio
- exact match
- purl.obolibrary.org/obo/GO_0001890
Sources (3)
via Wikidata · CC0
~11 min read
Article
10 sectionsContents
- In mammals
- Source-tissue types
- In lizards and snakes
- Research
- Evolution of placental structures
- Evolution of placental functions
- In plants
- See also
- References
- External links
Placentation is the formation, type and structure, or modes of arrangement of the placenta. The function of placentation is to transfer nutrients, respiratory gases, and water from maternal tissue to a growing embryo, and in some instances to remove waste from the embryo. Placentation is best known in live-bearing mammals (Theria), but also occurs in some fish, reptiles, amphibians, a diversity of invertebrates, and flowering plants. In vertebrates, placentas have evolved more than 100 times independently, with the majority of these instances occurring in squamate reptiles.
The placenta can be defined as an organ formed by the sustained apposition or fusion of fetal membranes and parental tissue for physiological exchange. This definition is modified from the original Mossman (1937) definition, which constrained placentation in animals to only those instances where it occurred in the uterus.