(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.
Macrocephalous
Definition:
(a.) Having a large head.
(a.) Having the cotyledons of a dicotyledonous embryo confluent, and forming a large mass compared with the rest of the body.
Example Sentences:
(1) When examined during gastrulation, however, Xenopus laevis and Rana pipiens macrocephalic embryos produced by GV injection as well as macrocephalic embryos produced by the hybrid cross, Rana septentrionalis female X Rana catesbeiana male, all exhibit alterations in the pattern of gastrulation.
(2) 2 dimensional basicranial form was defined by linear dimensions, Fourier coefficients and medial axis lengths from lateral cephalographs of age-sex matched samples of microcephalics, macrocephalics and normocephalics.
(3) We conclude that enlargement of the subarachnoid space in macrocephalic children is often a benign entity.
(4) They were a 2-year-old, short, macrocephalic and autistic girl, and a 5-year-old boy.
(5) A patient with partial deletion of the long arm of chromosome 11[del(11)(q23.3----qter)] had macrocephalic trigonocephaly, growth and mental retardation, congenital heart defect, and characteristic facial appearance familiar to that of 33 other reported patients with this deletion.
(6) It was based on the digitized mandibular outlines of three age-sexed samples of microcephalics, macrocephalics, and normocephalics.
(7) Evaluation of the derived medial axis lengths and branch point distances indicated complex patterns of mandibular shape contrasts between microcephalics and macrocephalics on the one hand and normocephalics on the other.
(8) Eighteen macrocephalic children with enlargement of the subarachnoid space (ESAS), with or without mild ventricular dilatation, were followed prospectively to a mean age of 56 months.
(9) To clarify indications and limits of computer assisted tomography and positive ventriculography the results of both methods were compared with each other retrospectively in 55 macrocephalic newborns and infants.
(10) The aims of the study were an evaluation of the usual criteria of macrocephaly and the drafting of a differentiated approach to the investigation of macrocephalics.
(11) We report on a family with X-linked hydrocephalus: progressive increase in head circumference (OFC) led to the diagnosis in 3 patients; however, in 5 with normal OFC, the initial diagnosis had been "nonspecific" mental retardation, until identification of relatedness between 3 macrocephalic boys suggested segregation of a major Mendelian gene.
(12) A better estimation of the intracranial volume of the macrocephalic children was obtained by means of the "Utrecht Head Measure", the product of OFC-squared and the head height.
(13) All six patients with severe OI (type III) had cortical atrophy on computed tomographic scan and three were also macrocephalic.
(14) Age is positively correlated with the percentage of microcephalic, macrocephalic and duplicate heads and coiled tails and negatively correlated with the percentage of no tail spermatozoa: these age-related variations are involved in the 90th percentile.
(15) Ventriculocentesis of the macrocephalic fetus was performed and abortion induced.
(16) Of six affected children, two had hyperbilirubinaemia, one muscular hypotonia, one was underweight for gestational age, one was macrocephalic, and one had supraventricular extrasystoles.
(17) One is a severely retarded, macrocephalic boy, who had the characteristic laboratory findings of Canavan disease and progressive leucodystrophy on neuro-imaging.
(18) Comparison of the clinical and radiologic characteristics of subarachnoid widening in macrocephalic children and in normocephalic or microcephalic children showed no significant differences.
(19) Of the 12 reported patients with deletions limited to band 13q14, seven had normal intelligence and five were macrocephalic.
(20) The data indicate that the shape contrasts between the mandibles of macrocephalics and microcephalics are more complex than traditionally envisaged and emphasize the need for further study to ascertain the effect of genetic and environmental influences on mandibular form.