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| | Germ Cell Migration |
 | | If the primordial germ cells are XX containing, they proliferate in the cortex or outer layer of the gonad. | | | The primordial germ cells multiply in the upper reaches of the yolk sac and migrate to the gonad, a mesodermal structure which forms near the embryonic kidneys. | | | If the primordial germ cells are XY containing, they proliferate in the medulla or core of the gonad. |
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http://www.people.virginia.edu/~rjh9u/gondev.html
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| | Vinyl |
| | Sheet vinyl has color and patterns that are either inlaid all the way through the vinyl or are a separate layer that is sandwiched between the backing and the clear wear-layer. | | | Sheet vinyl is made for residential rooms where easy cleanup is required like kitchens and bathrooms, and it is made commercially for offices and hospitals where traffic is very heavy and maintenance must be germ free. | | | Vinyl with a thicker wear layer performs better. |
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http://www.rothcarpet.com/vinyl.html
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| | Caspar Friedrich Wolff: Definition and Much More From Answers.com |
| | Wolff foreshadowed the germ layer theory by showing that the material out of which the embryo is constructed is, in an early stage of development, arranged in the form of leaf-like layers. | | | Wolff’s "De Formatione Intestinorum" rather than his "Theoria Generationis" embodies his greatest contribution to embryology; in it he foreshadows the idea of germ layers in the embryo, which, under Pander and von Baer, became the fundamental conception in structural embryology- he laid the foundation for the germ layer theory. | | | Wolff, Caspar Friedrich (käs'pär frē'drĭkh vôlf), 1733–94, German biologist, a founder of observational embryology. |
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http://www.answers.com/topic/caspar-friedrich-wolff
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| | Caspar Friedrich Wolff - Wikipedia, the free encyclopedia |
| | Wolff’s "De Formatione Intestinorum" rather than his "Theoria Generationis" embodies his greatest contribution to embryology; in it he foreshadows the idea of germ layers in the embryo, which, under Pander and von Baer, became the fundamental conception in structural embryology- he laid the foundation for the germ layer theory. | | | Wolff foreshadowed the germ layer theory by showing that the material out of which the embryo is constructed is, in an early stage of development, arranged in the form of leaf-like layers. | | | In 1759 Wolff graduated as an M.D. from the University of Halle with his dissertation "Theoria Generationis" where he revived and supported the theory of epigenesis previously proposed by Aristotle and William Harvey. |
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http://en.wikipedia.org/wiki/Caspar_Friedrich_Wolff
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| | Caspar Friedrich Wolff - Wikipedia, the free encyclopedia |
| | Wolff foreshadowed the germ layer theory by showing that the material out of which the embryo is constructed is, in an early stage of development, arranged in the form of leaf-like layers. | | | Wolff’s "De Formatione Intestinorum" rather than his "Theoria Generationis" embodies his greatest contribution to embryology; in it he foreshadows the idea of germ layers in the embryo, which, under Pander and von Baer, became the fundamental conception in structural embryology- he laid the foundation for the germ layer theory. | | | He described these in his dissertation "Theoria Generationis" after observing them in his studies on chick embryos. |
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http://en.wikipedia.org/wiki/Caspar_Friedrich_Wolff
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| | Caspar Friedrich Wolff - Wikipedia, the free encyclopedia |
| | Wolff foreshadowed the germ layer theory by showing that the material out of which the embryo is constructed is, in an early stage of development, arranged in the form of leaf-like layers. | | | Wolff’s "De Formatione Intestinorum" rather than his "Theoria Generationis" embodies his greatest contribution to embryology; in it he foreshadows the idea of germ layers in the embryo, which, under Pander and von Baer, became the fundamental conception in structural embryology- he laid the foundation for the germ layer theory. | | | It indicated that organs are formed in differentiated layers from undifferentiated cells.Traditional and prevailing theory had speculated that organisms were already preformed in the seed (theory of preformation), that is in the human a homunculus was already sitting in the sperm. |
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http://www.wikipedia.org/wiki/Caspar_Friedrich_Wolff
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| | endoderm on Encyclopedia.com |
| | The endoderm is the germ layer from which are formed the digestive system, many glands, and part of the respiratory system. | | | The inner layer of the cup is the endoderm; the outer layer is the ectoderm; a middle layer, the mesoderm, forms from a marginal zone. | | | Cell movement results in an invagination of the bottom region, or vegetal hemisphere, of the embryo so that it resembles a double-walled cup. |
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http://www.encyclopedia.com/html/e1/endoderm.asp
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| | Germ Cell Migration |
| | If the primordial germ cells are XX containing, they proliferate in the cortex or outer layer of the gonad. | | | The primordial germ cells multiply in the upper reaches of the yolk sac and migrate to the gonad, a mesodermal structure which forms near the embryonic kidneys. | | | If the primordial germ cells are XY containing, they proliferate in the medulla or core of the gonad. |
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http://www.people.virginia.edu/~rjh9u/gondev.html
(87 words)
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| | CWRU School of Dentistry - Class Notes (Oral Histology - Bell Stage) |
| | Identify the histologic features of the tooth germ that you have studied in previous frames. | | | The third component of the tooth germ is the dental sac which is a concentration of mesenchymal connective tissue that encircles the enamel organ and the dental papilla. | | | The layer of low columnar cells of the inner enamel epithelium is continuous with the layer of cuboidal cells that form the outer enamel epithelium at the structure termed the cervical loop. |
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http://www.cwru.edu/dental/web/histologyoral/imageinfo/teeth/bellstageoverview.htm
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| | Pharyngula Science |
| | Your original three germ layers consisted of ectoderm, which developed into your epidermis and central nervous system; endoderm, which forms the lining of your gut and associated organs; and mesoderm, which contributed to all the stuff in between your gut tube and your skin, muscle, bone, connective tissue, blood, etc. | | | The medusa has greater complexity, new cell types, and also seems to have a distinct third germ layer—calling it a diploblast seems to be a misnomer. | | | In the medusa, the ectocodon also cavitates, and the part near the feeding organ (manubrium, ma in the stage 5-6 diagram) will form a layer of smooth muscle (green), while the part towards the outside will form the smooth and striated muscle lining the umbrella-shaped bell of the jellyfish. |
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http://pharyngula.org/index/science/2005/06
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| | AllRefer.com - mesoderm (Cell Biology) - Encyclopedia |
| | The mesoderm is the germ layer that forms many muscles, the circulatory and excretory systems, and the dermis, skeleton, and other supportive and connective tissue. | | | Continued cell movement results in an invagination of the bottom region of the embryo, producing a form that resembles a double-layered cup. | | | mesoderm, in biology, middle layer of tissue formed in the gastrula stage of the developing embryo. |
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http://reference.allrefer.com/encyclopedia/M/mesoderm.html
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| | Carol Milano |
| | Whole grains have three layers: the germ (the inner layer), the endosperm (the middle layer) and bran (the outer layer). | | | Pearled barley, however, is generally refined, and rye is rarely whole in the U.S., notes Dr. Jacobs, so you'll need to check carefully. | | | Two separate studies of women in the ongoing Nurses Health Study at Harvard Medical School found some dramatic benefits. |
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http://www.nasw.org/users/milanocarol/wholewheat_the_whole_truth.html
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| | VE Glossary |
| | Process in which post-blastula embryo forms three germ layers, which will differentiate into various structures and organs | | | Embryo in early stages of germ layer formation, immediately following blastula stage; Gastrula consists of two cell layers (ectoderm and endoderm) which enclosed archenteron (central cavity) that opens to outside via the blastopore | | | Mature reproductive cell; Special haploid cell (eggs or sperm) that fuses with another gamete from opposite sex to form a zygote; Also known as germ cell |
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http://www.visembryo.com/baby/gloss.html
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| | developmental_biology.html |
| | allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, ectoderm, embryo, embryogenesis, embryogeny, embryology, endoderm, evocation, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germ, germination, induction, juvenile, larva, mesoderm, metamorphosis, morphogenesis, morula, neoteny, neural development, nymph, ontogeny, oosperm, ovism, paedogenesis, pangenesis, phylogeny, primordium, pupa, rudiment, teratology, zygote | | | An understanding of the specialization of stem cells to specific tissues and organs could lead to the specific cloning of organs for medical purposes. |
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http://www.informationgenius.com/encyclopedia/d/de/developmental_biology.html
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| | ipedia.com: Developmental biology Article |
| | allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, ectoderm, embryo, embryogenesis, embryogeny, embryology, endoderm, evocation, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germ, germination, induction, juvenile, larva, maternal effect, mesoderm, metamorphosis, morphogenesis, morula, neoteny, neural development, nymph, ontogeny, oosperm, ovism, paedogenesis, pangenesis, phylogeny, primordium, pupa, rudiment, teratology, zygote |
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http://www.ipedia.com/developmental_biology.html
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| | Corn oil instead of corn meal - Garden Experiments Forum - GardenWeb |
| | Most corn oil is obtained by crushing and extracting wet milled corn germ, and like "wheat germ oil," corn oil could more accurately be called "corn germ oil." The US produces 57% of the world's supply of corn oil. | | | The second article says that the antifungal compounds of interest come from the "endosperm (including aleurone layer) and embryo tissues". | | | Corn oil's desirable properties include: its mild nutty flavor, its high levels of unsaturated fatty acids, its low levels of saturated fatty acids, its very low levels of linolenic acid, its high levels of unsaponifiables (including phytosterols and tocopherols), and its stability during frying. |
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http://forums.gardenweb.com/forums/load/lab/msg0314030518507.html?/lab/...
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| | Developmental biology |
| | allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, ectoderm, embryo, embryogenesis, embryogeny, embryology, endoderm, evocation, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germ, germination, induction, juvenile, larva, maternal effect, mesoderm, metamorphosis, morphogenesis, morula, neoteny, neural development, nymph, ontogeny, oosperm, ovism, paedogenesis, pangenesis, phylogeny, primordium, pupa, rudiment, teratology, zygote | | | The findings of developmental biology can help to understand (or some day, cure) developmental malfunctions such as chromosomal aberration, for example, down syndrome. | | | The related field of evolutionary developmental biology was formed largely in the 1990s and is a synthesis of findings from molecular developmental biology and evolutionary biology which considers the diversity of organismal form in an evolutionary context. |
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http://www.brainyencyclopedia.com/encyclopedia/d/de/developmental_biology.html
(393 words)
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| | Encyclopedia4U - Developmental biology - Encyclopedia Article |
| | allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, ectoderm, embryo, embryogenesis, embryogeny, embryology, endoderm, evocation, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germ, germination, induction, juvenile, larva, mesoderm, metamorphosis, morula, neoteny, neural development, nymph, ontogeny, oosperm, ovism, paedogenesis, pangenesis, phylogeny, primordium, pupa, rudiment, teratology, zygote | | | An understanding of the specialization of stem cells to specific tissues and organs could lead to the specific cloning of organs for medical purposes. |
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http://www.encyclopedia4u.com/d/developmental-biology.html
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| | eMedicine - Hair Anatomy : Article by Samer Alaiti, MD, FACP |
| | During the telogen (resting) phase, the secondary follicular germ and the dermal papilla form the telogen germinal unit, from which the new anagen hair develops. | | | The fibrous root sheath is the outermost layer of the hair follicle and surrounds the vitreous layer. | | | Anagen hairs vary in size from large terminal hairs, such as those on the scalp, to the small vellus hairs that cover almost the entire glabrous skin (except palms and soles). |
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http://www.emedicine.com/ent/topic10.htm
(1964 words)
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| | What's in Your Pet's Food? |
| | Rice bran is the pericarp or bran layer and germ of the rice. | | | Rice gluten meal is the dried residue from rice after the removal of the larger part of the starch and germ, and separation of the bran by the process employed in the wet milling manufacture of rice starch or syrup, or by enzymatic treatment of the endosperm. | | | Rice hulls are a grain fraction, an inexpensive source of fiber that is considered a filler ingredient. |
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http://www.prestigepetproducts.com/WhatIsIt.htm
(1964 words)
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| | Integrative and Comparative Biology: Gastrulation in Calcareous Sponges: In Search of Haeckel's Gastraea1 |
| | In an attempt to understand gastrulation in calcareous sponges and determine whether there might be homology of the germ layers between the Calcarea and other metazoans, we have studied the development, metamorphosis, structure and function of the calcareous sponge Sycon, a member of the Calcaronea, the sponges studied by Haeckel and by his followers. | | | SYNOPSIS.Haeckel's studies of development in calcareous sponges (1872) led him to develop the "Gastraea Theory," which proposes that the ancestral mode of germ layer formation, or gastrulation, was by invagination to produce a functional gut. | | | The term is derived from the name given by Ernst Haeckel to a stage in the development of calcareous sponges, the gastrula, a ciliated egg-shaped larva with a mouth and a gut (Haeckel, 1872). |
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http://www.findarticles.com/p/articles/mi_qa4054/is_200504/ai_n13640628
(1229 words)
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| | Oral Cavity, Esophagus, Stomach |
| | This stage of development of the tooth germ can be observed in s39. | | | Define the structures in the enamel organ and the layers observed within the developing (secretory) tooth. | | | This double bulbed structure is delimited by the outer enamel organ that is a thin layer of squamous cells a couple cell layers thick that is separated from the dental-sac cells by a basal lamina that is thin and not apparent. |
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http://anatomy.iupui.edu/courses/histo_D502/D502f02/UpperGI/Lab.10.upper.GI.f02.html
(1229 words)
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| | Articles - Developmental biology |
| | allantois, amnion, blastocyst, blastomere, blastula, blastulation, chorion, chrysalis, cleavage, embryo, embryogenesis, embryogeny, embryology, extra-embryonic membrane, fetus (or foetus), gastrula, gastrulation, germ layer, germ plasm, germination, induction, juvenile, larva, maternal effect, metamorphosis, genome, morphogenesis, morula, neoteny, neural development, nymph, ontogeny, oosperm, ovism, paedogenesis, pangenesis, phylogeny, primordium, pupa, rudiment, seed, teratology, zygote | | | An understanding of the specialization of cells during embryogenesis may shield information on how to specialize stem cells to specific tissues and organs, which could lead to the specific cloning of organs for medical purposes. | | | Often used model organisms in developmental biology include the following: |
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http://www.centralairconditioners.net/articles/Developmental_biology
(499 words)
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| | Wheat, Bulgar, Bulghur, Couscous, Farina, Wheat Bran, Wheat Germ, Whole Wheat |
| | Wheat germ is the nutrient-rich core of the wheat kernel. | | | Wheat bran, the outer layer of the grain, is rich in fiber and nutrients. | | | Wheat, Bulgar, Bulghur, Couscous, Farina, Wheat Bran, Wheat Germ, Whole Wheat |
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http://www.truestarhealth.com/Notes/1994002.html
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| | The genus Gigaspora |
| | Subcellular organization of spores consists only of a bilayered spore wall; germ tubes arise from a thin papillate (warty) layer arising from inner surface the laminate layer. | | | Tommerup, I.C. and Sivasithamparam, K. Zygospores and asexual spores of Gigaspora decipiens, an arbuscular mycorrhizal fungus. | | | Sexual spores have been reported for one species, Gigaspora decipiens (Tommerup, 1988; Tommerup and Sivasithamparam, 1990), but this has not been confirmed. |
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http://invam.caf.wvu.edu/fungi/taxonomy/Gigasporaceae/Gigaspora/Gigaspora.htm
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| | 16anim3 |
| | The radiata develop only two germ layers, (ectoderm and endoderm but no mesoderm) and are therefore termed diploblastic (e.g., phylum Cnidaria) | | | All Bilaterally symmetrical animals develop three germ layers (ectoderm, mesoderm, and endoderm) and are termed triploblastic. | | | The bodies are derived from two embryonic cell layers (diploblastic), the ectoderm and endoderm which are separated by a third gelatinous layer called the mesoglea (this is not the same as "Mesoderm"). |
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http://www.uwinnipeg.ca/~simmons/1116/16anim3.htm
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| | ARS Publication request: INFARARED BEAK TREATMENT VS. HOT-BLADE BEAK TRIMMING EFFECTS ON LAYING HEN WELL-BEING |
| | The infrared beak system produces a high intensity heat that penetrates through the corneum layer down to the corneum growing basal tissue to burn the tip of beak and to stop germ layer growth. | | | Technical Abstract: Beak trimming (also named beak tipping, beak mutilation, debeaking or partial beak amputation), removal of 1/3 to 1/2 of the beak, is a routine practice in the poultry industry to prevent feather pecking and cannibalism in layers, broiler breeders, and turkeys. | | | However, there is considerable disparity of views on beak trimming among different social and professional groups, and there is a growing movement against husbandry practices which may cause pain and suffering in farm animals, including beak trimming. |
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http://www.ars.usda.gov/research/publications/Publications.htm?seq_no_115=161163
(347 words)
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| | vlmn210.txt |
| | The inner layer or the invaginated part of the blastoderm, which immediately encloses the gut-cavity is the entoderm, the inner or vegetal germ-layer, from which develop the wall of the alimentary canal and all its appendages, the coelom-pouches, etc. (Figures 1.35 and 1.36 i). | | | This must be regarded as the beginning of a rudimentary brain. | | | This important organ had hitherto been found only in the Vertebrates, not a single trace of it being discoverable in the Invertebrates. |
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http://www.knowledgerush.com/pg/etext04/vlmn210.txt
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