Multicellular embryo. Medical search. Frequent questions

An embryo is the early stage of the development of a multicellular organism. (disabled-world.com)
The first plants evolved from an organism much like the multicellular green algae living today. (millerandlevine.com)
The development of a multicellular organism is an incredibly complex process, and we focus on two aspects, tissue morphogenesis and formation of the nervous system. (sfu.ca)
The morphogenesis of epithelial tissues sculpts an organism into its final form, and we study epithelial morphogenesis in the ovary and the embryo. (sfu.ca)
The embryo is a pool of autonomous cellular robots that have general rules for how they should respond to environmental cues…and those cues tend to vary in predictable ways across the embryo, leading to a consistent cascade of action that produces a relatively consistent complex product, the multicellular organism. (scienceblogs.com)
In our research, we use the zebrafish embryo to investigate how intercellular Wnt protein transport is regulated and how signals are subsequently delivered to the target cell in a living vertebrate organism. (exeter.ac.uk)
How can biologists understand embryonic development, i.e., the incredibly complicated process by which a single cell transforms itself into a complex multicellular organism through a series of cell divisions and movements? (uci.edu)

Driever, W. & Nüsslein-Volhard, C. A gradient of bicoid protein in Drosophila embryos. (nature.com)
Driever, W. & Nüsslein-Volhard, C. The bicoid protein determines position in the Drosophila embryo in a concentration-dependent manner. (nature.com)
Her main work with bicaudal allowed her to publish a paper in 1977, "Genetic analysis of pattern-formation in the embryo of Drosophila melanogaster. (wepapers.com)
The dissertation topic focused on genetic patterns in Drosophila embryos and the various mutations that can occur throughout development (Resnik 2012). (wepapers.com)
By using published DNA binding specificity data for five transcription factors active in the early Drosophila embryo, genomic regions containing unusually high concentrations of predicted binding sites were identified for these factors. (sdbonline.org)
The transcription factors Bicoid (Bcd), Caudal (Cad), Hunchback (Hb), Krüppel (Kr), and Knirps (Kni) act at very early stages of Drosophila development to define the anterior-posterior axis of the embryo. (sdbonline.org)
Reed B. and Harden N. (2017) Studying nonproliferative roles for Egfr signaling in tissue morphogenesis using dorsal closure of the Drosophila embryo. (sfu.ca)
Most of the studies will exploit the unique advantages of the early Drosophila embryo for the development of quantitative live cell imaging methods. (4dnucleome.org)

The origin of multicellular life from a group of colonial organisms is a stretch of the imagination and is not based on any physical evidence. (answersingenesis.org)
Paul Rainey, who led the study at the New Zealand Institute for Advanced Study and the Max Planck Institute for Evolutionary Biology, explains: "Simple cooperating groups -- like the mats that interest us -- stand as one possible origin of multicellular life, but no sooner do the mats arise, than they fail: the same process that ensures their success -- natural selection -- , ensures their demise. (sciencedaily.com)

Figure 1: Classic models for lineage segregation in the early mouse embryo. (nature.com)
Louvet-Vallee, S., Vinot, S. & Maro, B. Mitotic spindles and cleavage planes are oriented randomly in the two-cell mouse embryo. (nature.com)
Piotrowska, K. & Zernicka-Goetz, M. Role for sperm in spatial patterning of the early mouse embryo. (nature.com)
Solely from stem cells, without egg, sperm or womb, synthetic mouse embryo models were created. (disabled-world.com)

animal Any member of a clade of multicellular eukaryotic organisms belonging to the biological kingdom Animalia. (wikipedia.org)
In other multicellular organisms, the word "embryo" can be used more broadly to describe any early developmental or life cycle stage before birth or hatching. (disabled-world.com)
All life evolved from a single-celled universal common ancestor, and at various times in Earth history, single-celled organisms threw their lot in with each other to become larger and multicellular, resulting, for instance, in the riotous diversity of animals. (bristol.ac.uk)
It is hardly surprising, then, that we have so many gaps in the evolutionary history of life, gaps in such key areas as the origin of the multicellular organisms, the origin of vertebrates, not to mention the origins of most invertebrate groups. (answersingenesis.org)
This is because they often lack biotransformation capacity, multicellular or multi- organ complexity, for example, the hypothalamus pituitary gonad (HPG) axis and the complete life cycle of whole organisms. (nih.gov)
Existence in multicellular organisms is measured as life cycles-from conception to death. (icr.org)
All multicellular creatures are descended from single-celled organisms. (sciencedaily.com)
Unicellular for those cells that are derived from human organisms are primed to replicate (clone) pre-embryos, which seem to have a high themselves by nature. (who.int)

The Oates lab is exploring how spatio-temporal patterns emerge at the tissue level from noisy cellular and molecular interactions using a population of genetic oscillators in the zebrafish embryo termed the segmentation clock. (epfl.ch)

Having been originally trained as a developmental biologist, I know that a lot of our knowledge about multicellular tissue interactions has come from that field. (embl.org)
I believe this collection of concepts, along with exciting new technologies, means that tissue biology - or multicellular systems biology - should be seen as an emerging field in its own right. (embl.org)
Over the last century, there has been a steady progression in the diversity and complexity of tissue culture methodologies used in biomedical research, the earliest reported examples of in vitro cell culture being that conducted by Ross G. Harrison who observed neuronal sprouting from frog embryo spinal cords on a microscope slide in 1907. (genengnews.com)

The mechanisms underlying the appearance of asymmetry between cells in the early embryo and consequently the specification of distinct cell lineages during mammalian development remain elusive. (nature.com)
Rossant, J. & Vijh, K. M. Ability of outside cells from preimplantation mouse embryos to form inner cell mass derivatives. (nature.com)
The team set out to grow a synthetic embryo model solely from naïve mouse stem cells cultured for years in a petri dish, dispensing with the need for starting with a fertilized egg. (disabled-world.com)
The method opens new horizons for studying how stem cells form various organs in the developing embryo. (disabled-world.com)
But in a Weizmann Institute of Science study published today in Cell , researchers have grown synthetic embryo models of mice outside the womb by starting solely with stem cells cultured in a petri dish - that is, without using fertilized eggs. (disabled-world.com)
Patterns are ubiquitous in living systems and underlie the dynamic organization of cells, tissues, and embryos. (mpi-cbg.de)
Driesch showed that the cells of an early embryo, when separated, could each continue to develop into normal larval forms. (asu.edu)
In past years we have witnessed development of novel human based multicellular systems from various type of stem cells via using self-organization capacity of cells. (rsc.org)
Where researchers once struggled to connect events at static timepoints, imaging tools now offer the ability to visualize the dynamic form and function of molecules, cells, tissues, and whole embryos throughout the entire developmental process. (cshlpress.com)
Further techniques are organized by the level of visualization they provide, from cells to tissues and organs to whole embryos. (cshlpress.com)
However, it is evident that while these approaches provide a convenient means of treating and analyzing cells, they do not reliably permit the formation of multicellular structures, which in turn form microenvironments similar to that found in vivo . (genengnews.com)
From before we are born - in fact, from the time we are no more than microscopic embryos - each one of our cells is already adept at sensing and responding to its neighbors. (fredhutch.org)
Sex organs are multicellular and jacketed by sterile cells. (cbsetuts.com)
The stem cells suits human needs, does not cause harm and can be obtained from both adult and fetal does not conflict with religious beliefs, it has tissues, umbilical cord and early embryos. (who.int)

It may one day make it possible to grow tissues and organs for transplantation using synthetic embryo models. (disabled-world.com)

Signs of aging and the mortality caused by them can be detected at the very beginning of embryonic development, but it is often masked by early selection, during which many embryos with dangerous mutations die. (vechnayamolodost.ru)

The group studies a population of coupled genetic oscillators in the vertebrate embryo termed the segmentation clock. (ens-lyon.fr)

Sex organs are simple, single-celled and there is no embryo formation after fertilization. (cbsetuts.com)
The sex organs are multicellular. (cbsetuts.com)

To try to overcome some of these limitations in this study, we have used Caenorhabditis elegans (nematode) and Danio rerio embryos (zebrafish) as alternative assays for DART hazard assessment of some candidate chemicals being considered for a new commercial application. (nih.gov)

These cellular systems were named organoids, gastruloids, synthetic embryos based on the similarities to their in vivo counterparts. (rsc.org)

Recording and contextualizing the science of embryos, development, and reproduction. (asu.edu)
Contributions to the Development of the Embryo. (asu.edu)
In the spring of 1891 Driesch performed experiments using two-celled sea urchin embryos, the results of which challenged the then-accepted understanding of embryo development. (asu.edu)
But a lot more is still to be learned, and it's not relevant only to embryo development. (embl.org)
One class of causes that have taken center stage in explaining development are gradient-forming "morphogens" that appear to structure the embryo along some body axis, normally anterio-posterior or dorso-ventral. (uci.edu)
At the early stages of development, the embryo acquires a disc which consists of three layers. (toppr.com)

Evidence of the single-celled ancestors of animals, dating from the interval in the Earth's history just before multicellular animals appeared, has been discovered in 570 million-year-old rocks from South China by researchers from the University of Bristol, the Swedish Museum of Natural History, the Paul Scherrer Institut and the Chinese Academy of Geological Sciences. (bristol.ac.uk)
This X-ray microscopy revealed that the fossils had features that multicellular embryos do not, and this led the researchers to the conclusion that the fossils were neither animals nor embryos but rather the reproductive spore bodies of single-celled ancestors of animals. (bristol.ac.uk)

Bryophytes are small multicellular green land plants. (cbsetuts.com)

If we assume, for example, that aging is the accumulation of breakdowns (in the broad sense of the word), then we have to admit that point mutations in DNA appear already in the first days after fertilization, when the embryo is just beginning to split (T. Bae et al. (vechnayamolodost.ru)

Plants are multicellular eukaryotes that have cell walls made of cellulose. (millerandlevine.com)

In this paper, we study two popular computational models for multicellular systems, i.e., the phase-field model and the coarse-grained model, and compare their performance in characterizing the cell morphologies, cell adhesion, and cell stiffness in a real C. elegans embryo. (aps.org)
Develop high-resolution imaging methods and associated computational algorithms for the visualization and quantification of dynamic enhancer-promoter interactions at select endogenous loci in living embryos. (4dnucleome.org)

Their study conquered the reproductive barrier between sheep and goats through embryo manipulation. (asu.edu)

multicellular interactions, including intracellular and Addresses intercellular biochemical signaling. (lu.se)

These findings can be integrated in a new unified framework that regards the early mammalian embryo as a self-organizing system. (nature.com)
The pattern of cell division is so similar to the early stages of animal (including human) embryology that until now they were thought to represent the embryos of the earliest animals. (bristol.ac.uk)
This chart or graphical representation detailing the fate of each part of an early embryo is referred to as a fate map. (asu.edu)

The device keeps the embryos bathed in a nutrient solution inside beakers that move continuously, simulating how nutrients are supplied by material blood flow to the placenta and closely controls oxygen exchange and atmospheric pressure. (disabled-world.com)

However, she had a breakthrough discovering a second gene that seemed to influence pattern formation in the embryos of flies, a gene later called dorsal. (wepapers.com)

Adaptations that allow seed plants to reproduce in areas without water include flowers or cones, the transfer of sperm by pollination, and the protection of embryos in seeds. (millerandlevine.com)

Bcd and Cad are maternal activators broadly distributed in the anterior and posterior portions of the embryo, respectively. (sdbonline.org)

The short answer to this question, of course, is through intricate experimental manipulations that reveal causal dependencies between different parts of the embryo as well as between the embryo and its maternal environment. (uci.edu)

Preimplantation genetic diagnosis (PGD) involves testing for specific genetic conditions prior to the implantation of an embryo in the uterine wall. (asu.edu)
The purpose of PGD is to identify what are considered to be abnormal embryos in order to select the most desirable embryos for implantation. (asu.edu)

We plan to extend this approach to include the visualization of several hundred fluorescent DNA foci in a library of genetically engineered fly lines to establish a general overview of the dynamics of an entire chromosome in a living embryo and its impact on transcription. (4dnucleome.org)

Even in the case of mice, certain experiments are currently unfeasible because they would require thousands of embryos. (disabled-world.com)

Multicellular systems biology uses computer modeling and simulation to give us a deeper understanding of the roles played by genes and genomes in living systems. (cam.ac.uk)

Fossilized nuclei and germination structures identify Ediacaran "animal embryos" as encysting protists' in Science 334. (bristol.ac.uk)

570 million year old multicellular spore body undergoing vegetative nuclear and cell division (foreground) based on synchrotron x-ray tomographic microscopy of fossils recovered from rocks in South China. (bristol.ac.uk)
Video showing 570 million year old multicellular spore body fossilised while undergoing vegetative nuclear and cell division. (bristol.ac.uk)

An embryo is formed upon fertilization. (cbsetuts.com)

Ultimately, a multicellular embryo will form, which will grow and develop over time. (toppr.com)

The evolutionary relationships are based on assumptions about how the embryos develop and the similarity in their molecular structure. (answersingenesis.org)
They develop from multicellular embryos and carry out photosynthesis using the green pigments chlorophyll a and b. (millerandlevine.com)

In the earlier research, the team successfully used this device to grow natural mouse embryos from day 5 to day 11. (disabled-world.com)

Now, researchers capture the emergence of multicellular life in real-time experiments. (sciencedaily.com)

One of his earliest experiments involved constricting the blastomeres of a fertilized salamander egg with a noose of fine baby hair, resulting in a partially double embryo with two heads and one tail. (asu.edu)

Professor Philip Donoghue said: "We were very surprised by our results - we've been convinced for so long that these fossils represented the embryos of the earliest animals - much of what has been written about the fossils for the last ten years is flat wrong. (bristol.ac.uk)
The appearance of multicellular animals occurs in an event known as the Cambrian explosion. (answersingenesis.org)
Sponges are sessile marine invertebrates that are considered to be the most basal and most "primitive" branch of the multicellular animals (Metazoa). (evolutionnews.org)

How do embryos grow and organize themselves? (cam.ac.uk)

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