Results 171 to 180 of about 8,571 (229)
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2012 ABSTRACTYolk is the primary source of calcium for embryonic growth and development for most squamates, irrespective of mode of parity. The calcified eggshell is a secondary source for embryonic calcium in all oviparous eggs, but this structure is lost in viviparous lineages.
Tom W. Ecay +3 more
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Clinical Genetics, 1974 The study concerns the diagnosis of fetal condition early in pregnancy ‐ within the first trimester. An instrument was designed to allow biopsy of the extraembryonic membranes under visual control. The instrument was tested in 95 pregnant women prior to legal termination of pregnancy.
Niels Hahnemann
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Journal of Morphology, 1990 AbstractDevelopment of the extraembryonic membranes and their structural alignment in the formation of the four placental categories that occur in Virginia striatula is similar to that of other Serpentes. The vascularized trilaminar omphalopleure contacts the uterine epithelium early in development to form the choriovitelline placenta, which ...
James R. Stewart
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Fur1ctions of extraembryonic membranes
, 1990 Abstract Several extraembryonic membranes arc interposed between the postimplantation mammalian embryo and the maternal tissue, and these subserve a variety of functions which together provide a well-regulated environment for embryo growth and development.
Stuart J. Freeman
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Somatic polyploidy in extraembryonic membranes of the snake,Elaphe guttata [PDF]
Protoplasma, 1993 Video-densitometric DNA measurements of Feulgenstained tissues of 42 day old eggs of the corn snake,Elaphe g. guttata (Columbridae, Serpentes), revealed a basic DNA content of 2C=2.17 pg, with somatic polyploidy in the allantois, the chorioallontois, the yolk sac, and other extraembryonic membranes.
R. Meyer, Walter Nagl
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Ultrastructural and cytochemical studies of the extraembryonic membranes of the rat
, 1967 Reid S. Connell
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Immunohistology of clotting factor V in human extraembryonic membranes
Placenta, 1987Blood clotting Factor V was studied on fixed and unfixed cryostat sections of term human placentae, basal plates, amniochorions, and first-trimester placentae by using one- and two-colour immunofluorescence. A monoclonal antibody (GB36) which reacts with cytotrophoblast was used to identify cytotrophoblast.
W. Page Faulk +3 more
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Protein synthesis by chick (Gallus domesticus) extraembryonic membranes
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 19931. The protein synthesis in chorioallantoic membrane (CAM), amniotic membrane (AM) and yolk sac (YS) were studied by in vitro culture with 14C L-glutamic and immunoautoradiography. 2. The yolk sac synthesizes transferrin, alpha-fetoprotein (AFP) and serum albumin. These three proteins are also synthesized, but only in slight amounts, by AM.
Luis Sánchez Palazón +1 more
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Formation of the Placenta and Extraembryonic Membranes
Annals of the New York Academy of Sciences, 1998ABSTRACT: In eutherian mammals, the first cell types that are specified during embryogenesis are committed to form extraembryonic (placenta and fetal membranes) rather than embryonic structures. The trophoblast cell lineage, for example, forms at the morula‐to‐blastocyst transition: cells at the periphery of the morula become trophoblast, whereas ...
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