| Autor: |
Whittington CM; School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence A08, New South Wales 2006, Australia., Buddle AL; School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence A08, New South Wales 2006, Australia., Griffith OW; Department of Biological Sciences, Macquarie University, Sydney, New South Wales 2109, Australia., Carter AM; Cardiovascular and Renal Research, Institute of Molecular Medicine, University of Southern Denmark, J. B. Winsloews Vej 21, 5000 Odense, Denmark. |
| Jazyk: |
angličtina |
| Zdroj: |
Philosophical transactions of the Royal Society of London. Series B, Biological sciences [Philos Trans R Soc Lond B Biol Sci] 2022 Dec 05; Vol. 377 (1865), pp. 20210261. Date of Electronic Publication: 2022 Oct 17. |
| DOI: |
10.1098/rstb.2021.0261 |
| Abstrakt: |
The vertebrate placenta, a close association of fetal and parental tissue for physiological exchange, has evolved independently in sharks, teleost fishes, coelacanths, amphibians, squamate reptiles and mammals. This transient organ forms during pregnancy and is an important contributor to embryonic development in both viviparous and oviparous, brooding species. Placentae may be involved in transport of respiratory gases, wastes, immune molecules, hormones and nutrients. Depending on the taxon, the embryonic portion of the placenta is comprised of either extraembryonic membranes (yolk sac or chorioallantois) or temporary embryonic tissues derived via hypertrophy of pericardium, gill epithelium, gut, tails or fins. These membranes and tissues have been recruited convergently into placentae in several lineages. Here, we highlight the diversity and common features of embryonic tissues involved in vertebrate placentation and suggest future studies that will provide new knowledge about the evolution of pregnancy. This article is part of the theme issue 'Extraembryonic tissues: exploring concepts, definitions and functions across the animal kingdom'. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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