What does gastrula mean?

Definitions for gastrula
ˈgæs trʊ lə; -ˌligas·tru·la

This dictionary definitions page includes all the possible meanings, example usage and translations of the word gastrula.

Princeton's WordNet

  1. gastrulanoun

    double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm

Wiktionary

  1. gastrulanoun

    A stage in the development of embryos of most animals consisting of a two-layered sac of ectoderm and endoderm.

Wikipedia

  1. gastrula

    Gastrulation is the stage in the early embryonic development of most animals, during which the blastula (a single-layered hollow sphere of cells), or in mammals the blastocyst is reorganized into a multilayered structure known as the gastrula. Before gastrulation, the embryo is a continuous epithelial sheet of cells; by the end of gastrulation, the embryo has begun differentiation to establish distinct cell lineages, set up the basic axes of the body (e.g. dorsal-ventral, anterior-posterior), and internalized one or more cell types including the prospective gut.In triploblastic organisms, the gastrula is trilaminar (three-layered). These three germ layers are the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer). In diploblastic organisms, such as Cnidaria and Ctenophora, the gastrula has only ectoderm and endoderm. The two layers are also sometimes referred to as the hypoblast and epiblast. Sponges do not go through the gastrula stage, which is why they are basal among all animals. Gastrulation takes place after cleavage and the formation of the blastula, or blastocyst. Gastrulation is followed by organogenesis, when individual organs develop within the newly formed germ layers. Each layer gives rise to specific tissues and organs in the developing embryo. The ectoderm gives rise to epidermis, the nervous system, and to the neural crest in vertebrates. The endoderm gives rise to the epithelium of the digestive system and respiratory system, and organs associated with the digestive system, such as the liver and pancreas. The mesoderm gives rise to many cell types such as muscle, bone, and connective tissue. In vertebrates, mesoderm derivatives include the notochord, the heart, blood and blood vessels, the cartilage of the ribs and vertebrae, and the dermis.Following gastrulation, cells in the body are either organized into sheets of connected cells (as in epithelia), or as a mesh of isolated cells, such as mesenchyme.Although gastrulation patterns exhibit enormous variation throughout the animal kingdom, they are unified by the five basic types of cell movements that occur during gastrulation: Invagination Involution Ingression Delamination EpibolyThe terms "gastrula" and "gastrulation" were coined by Ernst Haeckel, in his 1872 work "Biology of Calcareous Sponges". Lewis Wolpert, pioneering developmental biologist in the field, has been credited for noting that "It is not birth, marriage, or death, but gastrulation which is truly the most important time in your life."

ChatGPT

  1. gastrula

    A gastrula is a stage in the embryonic development of animals. It is characterized by the invagination or infolding of a blastula, which is a hollow ball of cells, forming a structure with three distinct layers - the ectoderm, the mesoderm, and the endoderm. These three layers eventually give rise to various body parts and organs in the mature organism. This phase also marks the beginning of morphogenesis, the process of the organism taking shape.

Webster Dictionary

  1. Gastrulanoun

    an embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea

  2. Gastrulaadjective

    of or pertaining to a gastrula

  3. Etymology: [NL., dim. fr. Gr. the stomach.]

U.S. National Library of Medicine

  1. Gastrula

    The developmental stage that follows BLASTULA. It is characterized by the morphogenetic cell movements including invagination, ingression, and involution. Gastrulation begins with the formation of the PRIMITIVE STREAK, and ends with the formation of three GERM LAYERS, the body plan of the mature organism.

Entomology

  1. Gastrula

    that embryonic stage resembling a sac, with an outer layer of epiblastic cells and an inner layer of hypoblastic cells.

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Numerology

  1. Chaldean Numerology

    The numerical value of gastrula in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of gastrula in Pythagorean Numerology is: 9

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"gastrula." Definitions.net. STANDS4 LLC, 2024. Web. 19 Mar. 2024. <https://www.definitions.net/definition/gastrula>.

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