the vascular organ formed in the uterus during pregnancy, consisting of both maternal and embryonic tissues and providing oxygen and nutrients for the fetus and transfer of waste products from the fetal to the maternal blood circulation
See also afterbirth
2.
the corresponding organ or part in certain mammals
3. botany
a.
the part of the ovary of flowering plants to which the ovules are attached
b.
the mass of tissue in nonflowering plants that bears the sporangia or spores
Word origin
C17: via Latin from Greek plakoeis flat cake, from plax flat
Examples of 'placentae' in a sentence
placentae
A significant choline peak (choline/lipid ratio 1.35-1.79) was detected in all healthy placentae.
Fiona C Denison, Scott I Semple, Sarah J Stock, Jane Walker, Ian Marshall, Jane ENorman 2012, 'Novel use of proton magnetic resonance spectroscopy (1HMRS) to non-invasively assessplacental metabolism.', PLoS ONEhttp://europepmc.org/articles/PMC3416751?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
There was no case of abruption placentae, placenta previa or fetal malformation.
Antonio Carlos Vieira Lopes, Kleber Pimentel, Alessandro de Moura Almeida, EduardoCosta Matos, Maria Betânia Pereira Toralles 2007, 'Complicações materno-fetais da biópsia de vilo corial: experiência de um centro especializadodo Nordeste do Brasil Fetal and maternal complications of chorionic villus sampling:results from a specialized center in the Northeast of Brazil', Revista Brasileira de Ginecologia e Obstetríciahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-72032007000700006. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Location and occurrence of complement components and regulators in placentae were analyzed.
A. Inkeri eLokki, A. Inkeri eLokki, A. Inkeri eLokki, Jenni eHeikkinen-Eloranta, JennieHeikkinen-Eloranta, Hanna eJarva, Hanna eJarva, Hanna eJarva, Terhi eSaisto, Marja-LiisaeLokki, Hannele eLaivuori, Hannele eLaivuori, Seppo eMeri, Seppo eMeri, Seppo eMeri 2014, 'Complement activation and regulation in preeclamptic placenta', Frontiers in Immunologyhttp://journal.frontiersin.org/Journal/10.3389/fimmu.2014.00312/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The other 10 placentae were utilized in a comparison of three tissue collection conditions.
Lindsey A Sjaarda, Katherine A Ahrens, Daniel L Kuhr, Tiffany L Holland, Ukpebo ROmosigho, Brian T Steffen, Natalie L Weir, Hannah K Tollman, Robert M Silver, MichaelY Tsai, Enrique F Schisterman 2018, 'Pilot study of placental tissue collection, processing, and measurement proceduresfor large scale assessment of placental inflammation.', PLoS ONEhttp://europepmc.org/articles/PMC5947903?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The cell membranes used in this study were isolated from term human placentae.
ROMANA MASNIKOSA, J. ANNA NIKOLIC, OLGICA NEDIC 2003, 'Membrane-associated insulin-like growth factor (IGF) binding structures in placentalcells', Journal of the Serbian Chemical Societyhttp://www.shd.org.yu/HtDocs/SHD/Vol68/No11/V68-No11-04.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Short-term infection assays were performed on placental chorionic villi isolated from term placentae.
Mariantonietta Di Stefano, Maria Luisa Calabrò, Iole Maria Di Gangi, Santina Cantatore,Massimo Barbierato, Elisa Bergamo, Anfumbom Jude Kfutwah, Margherita Neri, Luigi Chieco-Bianchi,Pantaleo Greco, Loreto Gesualdo, Ahidjo Ayouba, Elisabeth Menu, Josè Ramòn Fiore 2008, 'In Vitro and In Vivo Human Herpesvirus 8 Infection of Placenta', PLoS ONE10.1371/journal.pone.0004073. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)