chorionic floating villus

floating villus

A chorionic villus that is not attached to the placental basal plate and it is immersed in maternal blood.

Typ Organ
Übergeordnete Struktur chorionic villus
Lateinischer Name floating villus

Unterstrukturen

chorionic mature intermediate villus Organ chorionic terminal villus Vessel

Häufig gestellte Fragen

What is a chorionic floating villus?
A chorionic floating villus is a type of chorionic villus that is not attached to the placental basal plate or maternal uterine wall. Instead, it is freely suspended and immersed in the maternal blood that fills the intervillous space of the placenta.
What is the primary function of chorionic floating villi?
Chorionic floating villi are the primary sites of maternal-fetal exchange in the placenta. Because they are bathed in maternal blood, their large collective surface area and thin exchange membrane allow efficient transfer of oxygen, glucose, amino acids, fatty acids, and vitamins from mother to fetus, as well as elimination of carbon dioxide and waste products from fetal blood.
How do floating villi differ from anchoring villi?
Floating villi are immersed in maternal intervillous blood and serve primarily for exchange, while anchoring villi are attached to the maternal uterine wall and serve primarily for structural support and trophoblast invasion. The trophoblast covering of floating villi is maintained as an intact syncytiotrophoblast layer, whereas the tip of anchoring villi transitions to a cytotrophoblast cell column.
What subtypes of villi are classified as floating villi?
Floating villi include mesenchymal villi (earliest type, precursors of other types), immature intermediate villi, mature intermediate villi, and terminal villi. Terminal villi are the final branches of the floating villous tree and are the most specialized for exchange, characterized by sinusoidal capillary dilations and thin vasculosyncytial membranes.
What conditions affect the floating villous surface?
Various conditions can affect floating villi. Perivillous fibrin deposition involves accumulation of fibrin around floating villi, potentially reducing the exchange surface. Villitis of unknown etiology is an inflammatory condition in which maternal immune cells infiltrate the stroma of floating villi, impairing placental function. Increased syncytial knots (aggregates of syncytiotrophoblast nuclei) in floating villi are a marker of villous hypoxia and placental aging.

Verwandte Strukturen

mucus body coating mucous body coating mucus cocoon mucous cocoon Mullerian duct ductus paramesonephricus multi cell part structure cell part cluster multicellular anatomical structure multicellular structure multilaminar epithelium laminated epithelium multi-tissue structure multi-tissue structures multi-unit eye

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Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.