What's the difference between allantois and embryo?
Allantois
Definition:
(n.) Alt. of Allantoid
Example Sentences:
(1) Ethylene glycol caused 1) maternal homeostatic changes including metabolic acidosis and hyperosmolality, 2) extraembryonic lesions with degeneration of allantois and reduced villigenesis being more prevalent, and 3) materno-fetal effects such as decreases in fetal and maternal body weights, decreased maternal food intake, and fetal abnormalities (vertebral, rib, and sternebral defects).
(2) In the chorio-allantois, decrease in the Nm up to the 14th day is evidently connected with the transfer of the cells into R2-state, and then decrease of the proliferative pool takes place.
(3) The concentration of calcium in allantoic fluid declined during incubation in both groups, owing largely to accompanying increases in allantoic volume, but total amounts of calcium in the allantois did not vary with time.
(4) The yolk-sac consists of vascular and non-vascular portions and, together with the surrounding trophectoderm (trophoblast), forms the yolk-sac placenta of the opossum: the allantois does not contribute to formation of the placenta.
(5) Since the HA functions in adsorption of virus to cells, it is concluded that removal or modification of an oligosaccharide structure at this position is required for influenza B virus to attach to and infect the allantois cells of the egg and that this has important implications for the antigenic configuration of the molecule.
(6) This, together with asynchronous development, was used to help explain why groups of embryos responded to the teratogen for 18 hours longer than single embryos and why exposure 18 hours before the allantois on average appears, killed some young.
(7) PGCs first become visible by alkaline phosphatase staining in the root of the developing allantois at 8.5 days post coitum (dpc).
(8) Ovine chorion, allantois, and amnion from days 23, 26, 28, 35, 45, 53, 62, and 72 and yolk sac from day 23 of pregnancy were isolated by dissection and cultured for 24 h in modified minimum essential medium in the presence of [35S] methionine to characterize in vitro synthesis and release of proteins.
(9) The passive permeability to 36Cl of isolated pieces of amnion (112), amniochorion (41) and allantois (54) from 55 pregnant ewes was studied in vitro.
(10) In culture or allantois virus containing liquids the large number of extracellular viral nucleoprotein prone to antinucleoprotein monoclonal antibodies was found.
(11) In 9,5-day embryos the primary sex cells are localized in the mesenchyma of the allantois and in the intestinal entoderm.
(12) The day 8 and day 9 embryos were divided into trophoblast and placental anlage, yolk sac, amnion, and allantois, as well as cranial, central, and caudal embryonic tissue.
(13) The electrolyte transport capacities of the porcine placenta and fetal membranes (amnion, chorion, and allantois) during gestation (47-112 days) were assessed in vitro and in the absence of electrochemical, osmotic, or hydrostatic driving forces.
(14) A retinol-binding protein (RBP), synthesized and secreted by ovine allantois in vitro, was purified from culture medium.
(15) The amniotic membrane after separation from the chorion was covered by a fine mesh of microvessels, whereas the allantois was avascular.
(16) This means that the presented cases of umbilical cord anomalies and function disorders of allantois vessels can be interpreted as an in-vivo model to show pressure and resistance parameters in foetoplacental circulation.
(17) Embryos lacking normal gene activity fail to form the notochord, the entire posterior region and the allantois, and die at about 10 days of gestation.
(18) It appears that the avian allantois, in addition to its role in respiration and urea disposal, also serves the instant CA removal from the circulation.
(19) Around the 8th day p.c., the allantois reaches contact with the ectoplacental cone, which develops into the chorioallantoic (definitive) placenta.
(20) It has been shown that capillary formation in chorion-allantois membranes of chicken embryos under the influence of tumour necrosis factor (TNF) on neovascularization process depends on the dose applied and that the character of this influence may be different.
Embryo
Definition:
(n.) The first rudiments of an organism, whether animal or plant
(n.) The young of an animal in the womb, or more specifically, before its parts are developed and it becomes a fetus (see Fetus).
(n.) The germ of the plant, which is inclosed in the seed and which is developed by germination.
(a.) Pertaining to an embryo; rudimentary; undeveloped; as, an embryo bud.
Example Sentences:
(1) It was found that the skeletal muscle enzyme of the chick embryo is independent of the presence of creatine and consequently is another constitutive enzyme like the creatine kinase of the early embryonic chick heart.
(2) Since 1987, it has become possible to obtain immature ova from the living animal and to let them mature, fertilize and develop into embryos capable of transplantation outside the body.
(3) In X-irradiated litters, almost invariably, the incidence of anophthalmia was higher in exencephalic than in nonexencephalic embryos and the ratio of these incidences (relative risk) decreased toward 1 with increasing dose.
(4) The effects of hormonal promotion of T24-ras oncogene-transfected rat embryo fibroblasts (REF) were compared to cotransformation of these cells with adenovirus E1A and ras.
(5) Scatchard analyses of binding data obtained with synaptosomal preparations from 17-day-old embryos revealed two T3 binding sites.
(6) In the stage 24 chick embryo, a paced increase in heart rate reduces stroke volume, presumably by rate-dependent decrease in passive filling.
(7) From the biochemical markers in follicular fluid, cyclic adenosine monophosphate has a distinct predictive value in regard to pregnancy in in vitro fertilization-embryo transfer cycles.
(8) Implantation of the mouse embryo involves the invasion of the secondary trophoblast giant cells of the ectoplacental cone (EPC) into the uterine decidua.
(9) They suggest that an endogenous retinoid could contribute to positional information in the early Xenopus embryo.
(10) A cytogenetic and anatomopathologic study of an embryo of 24 mm crown-rump length showing pure triploidy (69,XXY) is reported.
(11) The in vivo approach consisted of interspecies grafting between quail and chick embryos.
(12) Here we report direct measurements of protein kinase C (PKC) activity in uninduced ectoderm, and in neuroectoderm shortly after induction by the involuting mesoderm, in Xenopus laevis embryos.
(13) Results obtained from cumulative labeling and pulse-labeling and chase experiments with cells from late gastrulae, yolk plug-stage embryos, and neurulae showed that the 30S RNA is an intermediate in rRNA processing and is derived from 40S pre-rRNA and processed to 28S rRNA.
(14) During that time they have repeatedly demonstrated the likely existence of signalling molecules or morphogens that control the pattern of development in the embryo.
(15) Ernst Reissner studied the formation of the inner ear initially using the embryos of fowls, then the embryos of mammals, mainly cows and pigs, and to a less extent the embryos of man.
(16) The objective of this study was to examine the effects of different culture media used for maturation of bovine oocytes on in vitro embryo development following in vitro fertilization.
(17) By 3 d in the chick embryo, the first neurons detected by antibodies to Ng-CAM are located in the ventral neural tube; these precursors of motor neurons emit well-stained fibers to the periphery.
(18) None of the factors tested was found to have a statistically significant effect on embryo yield.
(19) The embryo stages were assessed visually and some were investigated histologically.
(20) Ninety semen specimens were analysed for use in an IVF-embryo transfer (ET) programme.