embryo sac
the female gametophyte of antiospermous plants, within the embryo begins development
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Embryonic Development: Putting on the finishing touches
Insect (Drosophila) and frog (Xenopus) development (and probably that of animals in general) passes through three rather different (although often overlapping) phases: ...
Embryo
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Embryology
THE TERM Embryology, in its widest sense, is applied to the various changes which take place during the growth of an animal from the egg to the adult condition: it is, however, ...
Embryo
[Gr. embryon]. The stage in a developing organism after cleavage has occurred and before hatching or birth.
An embryonic cell that can replicate indefinitely, transform into other types of cells, and serve as a continuous source of new cells.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
embryo -- The earliest stage of development in an animal or plant. An embryo begins to form following the fusion of egg and sperm (a zygote).
embryo Term applied to the zygote after the beginning of mitosis that produces a multicellular structure.
embryo sac Alternate term applied to the angiosperm female gametophyte contained within a megaspore. PICTURE ...
embryo: An animal in the early stage of development before birth. In humans, the embryo stage is the first three months following conception.
environment: The nongenetic conditions and circumstances that affect a person's conduct and health.
Embryonic stem (ES) cells: Cell lines derived from early embryos that have the potential to differentiate into all types of somatic cells as well as to form germ line cells, and hence whole animals, when injected into early embryos.
embryo
(em-bree-oh) [Gk. en, in + bryein, to swell]
A developing stage of multicellular organisms; in humans, the stage in the development of offspring from the first division of the zygote until body structures begin to appear; ...
Embryonic stem cell A cell found in early embryos that can renew itself and differentiate into the many cell types that are found in the human body.
embryo. The small plantlet within the seeds in almond, the embryo develops into the kernel.
endoparasite. A parasite that lives inside its host.
Embryonic stem cell ethical debate
Blastocysts
A blastocyst is a stage of development of an embryo when it is around five days old and made up of about 100 cells.
embryology - study of embryogenesis, the development of animals and plants from fertilization to birth/hatching.
embryo sac
The female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure with eight haploid nuclei.
Embryo: A developing offspring during the period when most of its internal organs are forming. It is called fetus in the next stage of development.
Embryonic stem (ES) cells An embryonic cell that can replicate indefinitely, transform into other types of cells, and serve as a continuous source of new cells.
Endonuclease See: restriction enzyme ...
Embryonic germ layers begin to be committed toward distinct developmental fates
E.
Cell migrations are a prominent feature of this developmental stage ...
Embryonic stem cells have the other advantage that they are multipotent and can turn into many different types of tissue in culture and therefore it's possible to learn from studying embryonic stem cells how differentiation occurs.
embryo The early developmental stage that, through embryological development, ultimately becomes an adult individual.
Embryological development reveals a unity of plan. During development, all vertebrates have a notochord and paired pharyngeal pouches. In fishes and amphibian larvae, the pouches become gills.
Embryology - the study of the development of embryo (from fecondation to birth). See also topobiology.
Entomology - the study of insects ...
in embryology, delimitation of a specific area in an organ-forming field, giving definite shape and limits to the organ primordium.
Please contribute to this project, if you have more information about this term feel free to edit this page ...
The embryo proper begins to form from an inner cell mass within the blastocyst. Some parts of the blastocyst will form the extra embryonic membranes such as the amnion, chorion and parts of the placenta.
7.4 Embryonic heart cells
Individual cells from the chick heart start beating spontaneously when grown in culture. Once good "electrical" connections are formed between adjacent cells, entire sheets of cells begin beating in unison.
Anlage
Embryonic primordium from which a specific part of the organism develops. The rudimentary basis of an organ in an embryo.
Related Terms:
Primordium
Early cells that serve as the mitotic progenitor of an organ in organogenesis.
Most die as embryos or fetuses. Occasionally an infant survives for a few days.
Abnormalities of the Sex Chromosomes
Turner Syndrome - XO
Characteristics of Turner syndrome include the following: ...
Chorionic villus sampling -- an invasive prenatal diagnostic procedure involving removal of villi from the human chorion to obtain chromosomes and cell products for diagnosis of disorders in the human embryo.
There are also embryonic stem cells, and these are derived from three and a half days in the mouse and about six- to eight-day embryos in people, and these are cells with even more potential than the adult cells, ...
More effective technologies for creating human embryos, harvesting stem cells, and producing organs from stem cells would have to be developed.
There are differences in the appearance of early vertebrate embryos. Amphibians rapidly form a ball of cells in early development. Birds, reptiles and mammals form a disk.
Paired-box containing genes found in many species that are involved in regulation of early embryogenesis. Pax genes code for (DNA binding) transcription factors.
Carbohydrate-mediated interactions between cells and their environment are important in differentiation, embryogenesis, inflammation, cancer and metastasis and other processes.
The most widely known source of stem cells is human/animal embryos, prompting controversy over stem cell research based on bioethics and the view that life begins at conception.
Illustrated in Figure 2 is a fluorescence digital image of a Swiss mouse embryo fibroblast cell stained with fluorescent probes targeting the nucleus (blue), mitochondria network (red), ...
Seeds are a protective structure that lets a plant embryo survive for long periods of time before it germinates. Seeds have food sources pre-packaged for plant embryos to provide for an embryo's needs in early growth.
The procedure by which one makes a transgenic mouse involves the injection of DNA into a fertilized embryo at the pro-nuclear stage. The DNA is generally cloned, and may be experimentally altered.
Originating in embryology, today developmental biology studies the genetic control of cell growth, differentiation and "morphogenesis," which is the process that gives rise to tissues, organs and anatomy.
broad classification of organisms that tend to share certain embryological traits; among these the formation of the "mouth first" (hence the name) during gastrulation, before the future anus.
Linear DNA is injected into a fertilized embryo at the pro-nuclear stage and may be incorporated into the genome. Injected embryos are implanted into a foster mother. Progenitors are screened for transgene in their genome.
Blastocyst the hollow ball stage of embryonic development
(blasto = bud‚ sprout)
Botanist a person who studies plants
(botan = grass‚ pasture) ...
inflammation of the organ in the uterus to which the embryo is attached ...
A variant of clinical magnetic resonance imaging, which has been adapted for non-invasive studies of small samples that range in size from rats to frog embryos. Typical spatial resolutions are in the range of tens to hundreds of micrometres.
seed - reproductive unit formed from a fertilized ovule, consisting of embryo and seed coat, and in some cases an endosperm (Glossary of PM) ...
Zygote: A fertilized egg. Or the diploid cell that results from the joining of two haploid gametes (sperm and egg) during sexual reproduction, that will cleave to form an embryo. See also fertilization, gamete.
 See also: Cells, Human, Organ, Trans, Cell
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