Germ Layers - The Embryo Project Encyclopedia
... Hertwig brothers provided evidence that the germ layers [6] had greater capacities for differentiation [40] than most scientists recognized. In 1881 the Hertwigs formulated their Coelom theory, which focused on the role of mesoderm [12] and also introduced the term and concept of mesenchyme [41], a ...
... Hertwig brothers provided evidence that the germ layers [6] had greater capacities for differentiation [40] than most scientists recognized. In 1881 the Hertwigs formulated their Coelom theory, which focused on the role of mesoderm [12] and also introduced the term and concept of mesenchyme [41], a ...
Cell, Vol. 37, 179-183, May 1984, Copynght 0 1984 by
... embryos. Very few biparental gynogenetic and androgenetic embryos survive implantation for very long. The most advanced embryo observed in those groups had 11 somites and was, at the time of sacrifice, approximately 1 day delayed in development, These results indicate that biparental gynogenetic and ...
... embryos. Very few biparental gynogenetic and androgenetic embryos survive implantation for very long. The most advanced embryo observed in those groups had 11 somites and was, at the time of sacrifice, approximately 1 day delayed in development, These results indicate that biparental gynogenetic and ...
The vegetal determinants required for the Spemann organizer move
... We show that just after fertilization the dorsal determinants are first of all localized in the vegetal region and not in the future dorsal region. Afterwards the determinants move to the dorsal subequatorial region. This is the first demonstration that a region of cytoplasm can contain the determin ...
... We show that just after fertilization the dorsal determinants are first of all localized in the vegetal region and not in the future dorsal region. Afterwards the determinants move to the dorsal subequatorial region. This is the first demonstration that a region of cytoplasm can contain the determin ...
Spemann-Mangold Organizer - The Embryo Project Encyclopedia
... developed the technique. While each claimed credit for the novel technique, the exact origin of its invention is unknown. Spemann proposed that both may have discussed the idea conversationally, and that each investigator felt justified in claiming credit for the idea. The Einsteck method consists o ...
... developed the technique. While each claimed credit for the novel technique, the exact origin of its invention is unknown. Spemann proposed that both may have discussed the idea conversationally, and that each investigator felt justified in claiming credit for the idea. The Einsteck method consists o ...
Dynamics of embryo axis elongation in amniotes vs. anamniotes
... process for all embryo development. It is during gastrulation that the blastula undergoes a reorganization of its cells in order to form and position the three germ layers, which will later form the organs of the adult. It is also during this process that the embryo transforms from a simple mass of ...
... process for all embryo development. It is during gastrulation that the blastula undergoes a reorganization of its cells in order to form and position the three germ layers, which will later form the organs of the adult. It is also during this process that the embryo transforms from a simple mass of ...
Hans Spemann (1869-1941) - The Embryo Project Encyclopedia
... Mechanics of the Kaiser Wilhelm Institute [36] for Biology in Berlin. While there he published his work on lens development [35], ?On the Determination of the First Organ Analgen of the Amphibian Embryo,? (1918). In 1919 he was appointed Professor of Zoology at the University of Freiburg [10] and es ...
... Mechanics of the Kaiser Wilhelm Institute [36] for Biology in Berlin. While there he published his work on lens development [35], ?On the Determination of the First Organ Analgen of the Amphibian Embryo,? (1918). In 1919 he was appointed Professor of Zoology at the University of Freiburg [10] and es ...
Fluorescent Analysis of Drosophila Amelia Dosio Studies have
... antibodies in the desired pattern of even-skipped and Sir2. Sir2 had the secondary antibody of Texas red in experiment 6 then changed to Rho Red. The time variant for this experiment was also changed. It was tested to see if primary antibody can be left for only two hours and not overnight while sec ...
... antibodies in the desired pattern of even-skipped and Sir2. Sir2 had the secondary antibody of Texas red in experiment 6 then changed to Rho Red. The time variant for this experiment was also changed. It was tested to see if primary antibody can be left for only two hours and not overnight while sec ...
PDF
... cate the presence of notochordal material except where it is clearly distinct from neighbouring structures. More details are shown in Plates 1-3. Reading from top to bottom, these are microphotographs of the 30th, 40th, 50th, &c, section as counted from the tail tip or the posterior end of the body. ...
... cate the presence of notochordal material except where it is clearly distinct from neighbouring structures. More details are shown in Plates 1-3. Reading from top to bottom, these are microphotographs of the 30th, 40th, 50th, &c, section as counted from the tail tip or the posterior end of the body. ...
Spina Bifida
... What causes spina bifida? What would prevent the neural tubes from closing properly? Folate seems to play a large role in the closing of the neural tube – but it is unknown exactly how folate works in this process. Folate influence was discovered by the increased incidence in spina bifida seen in I ...
... What causes spina bifida? What would prevent the neural tubes from closing properly? Folate seems to play a large role in the closing of the neural tube – but it is unknown exactly how folate works in this process. Folate influence was discovered by the increased incidence in spina bifida seen in I ...
Chapter 5
... Figure 2. Passive displacement of somatopleure and splanchnopleure due to the sinking of the head in proamnion. (A) Whole mount HH12 chicken embryo with the anterior amnion fold forming (yellow arrow) and an axial strip visible from the proamnion until the area opaca (red arrow). (B) Whole amount H ...
... Figure 2. Passive displacement of somatopleure and splanchnopleure due to the sinking of the head in proamnion. (A) Whole mount HH12 chicken embryo with the anterior amnion fold forming (yellow arrow) and an axial strip visible from the proamnion until the area opaca (red arrow). (B) Whole amount H ...
Literature review
... There are many morphological markers that identify the best blastocysts to transfer (See Fig. I.1.g). The best blastocysts (and the more likely to implant) will be cavitated or expanded on Day 5, have a distinct inner cell mass (ICM), a well laid down trophectoderm (TE) with sickle-shaped cells, a t ...
... There are many morphological markers that identify the best blastocysts to transfer (See Fig. I.1.g). The best blastocysts (and the more likely to implant) will be cavitated or expanded on Day 5, have a distinct inner cell mass (ICM), a well laid down trophectoderm (TE) with sickle-shaped cells, a t ...
Abnormalities occurred during female gametophyte development
... undergo meiosis normally and abortion mainly occurred at the stage when the chalazal-most megaspore beginning to form the mono-nucleate embryo sac, which is also consistent with our findings in the present study. But it seems that most of the previous researchers have neglected the abnormalities aro ...
... undergo meiosis normally and abortion mainly occurred at the stage when the chalazal-most megaspore beginning to form the mono-nucleate embryo sac, which is also consistent with our findings in the present study. But it seems that most of the previous researchers have neglected the abnormalities aro ...
Developmental capacity and pregnancy rate of tetrahedral
... different between the two groups. Out of the 195 SETs on day 3, 157 (81 %) came from the T group and 38 (19 %) from the nT group. On day 5, 135 SETs were performed, of which 111 (82 %) came from the T group and 24 (18 %) from the nT group. Pregnancy rates at the level of positive βhCG, biochemical p ...
... different between the two groups. Out of the 195 SETs on day 3, 157 (81 %) came from the T group and 38 (19 %) from the nT group. On day 5, 135 SETs were performed, of which 111 (82 %) came from the T group and 24 (18 %) from the nT group. Pregnancy rates at the level of positive βhCG, biochemical p ...
Failure of extraembryonic membrane formation and mesoderm
... (29, 36), suggesting that SMAD2 and SMAD4 are required to function together for egg cylinder elongation. In contrast to what was found in embryos lacking smad4 (36), smad2DC/DC embryos appear to have a well developed visceral endoderm surrounding the epiblast, although the cuboidal cell architecture ...
... (29, 36), suggesting that SMAD2 and SMAD4 are required to function together for egg cylinder elongation. In contrast to what was found in embryos lacking smad4 (36), smad2DC/DC embryos appear to have a well developed visceral endoderm surrounding the epiblast, although the cuboidal cell architecture ...
Theriogenology - GeneSearch Inc.
... remained lower than other domesticated livestock species. It is generally accepted that the embryonic capsule is the primary barrier to cryoprotectant entry into the embryo proper and techniques need to be developed to circumvent this obstacle. Therefore, the objective of this study was to develop a ...
... remained lower than other domesticated livestock species. It is generally accepted that the embryonic capsule is the primary barrier to cryoprotectant entry into the embryo proper and techniques need to be developed to circumvent this obstacle. Therefore, the objective of this study was to develop a ...
Abnormal Development at Early Postimplantation Stage in Mouse
... into pseudopregnant mice, we found that the birth rate of biopsied mice was significantly lower than that of control mice (Yu et al., 2009), which suggested that biopsy manipulation may affect postimplantation development of embryos. Mouse embryo implantation begins approximately 4.5 days postconcep ...
... into pseudopregnant mice, we found that the birth rate of biopsied mice was significantly lower than that of control mice (Yu et al., 2009), which suggested that biopsy manipulation may affect postimplantation development of embryos. Mouse embryo implantation begins approximately 4.5 days postconcep ...
The development of handed asymmetry in aggregation chimeras of
... method to distinguish its left from right, in order to create this body pattern. There is virtually nothing known about the mechanisms involved, but we have recently proposed a model, and a conceptual framework (Brown and Wolpert, 1990). The model proposes that there are three processes: conversion ...
... method to distinguish its left from right, in order to create this body pattern. There is virtually nothing known about the mechanisms involved, but we have recently proposed a model, and a conceptual framework (Brown and Wolpert, 1990). The model proposes that there are three processes: conversion ...
9 C HAPTER
... developed to the blastocyst stage. Conaghan et al.12, however, reported that a lower pyruvate uptake was observed by 2 to 8 cell embryos that implanted. These measurements were performed before embryonic genome activation and might therefore reflect differences inherited from the oocyte instead of a ...
... developed to the blastocyst stage. Conaghan et al.12, however, reported that a lower pyruvate uptake was observed by 2 to 8 cell embryos that implanted. These measurements were performed before embryonic genome activation and might therefore reflect differences inherited from the oocyte instead of a ...
the basics of equine embryo transfer
... foals from older mares that have difficulty caring foals to term, 2)to keep performance mares competing, 3)to get foals from physically unsound mares and 4)to maximize the number of foals a mare can produce. Embryo transfer is a technical and management intensive procedure. Timing is essential to su ...
... foals from older mares that have difficulty caring foals to term, 2)to keep performance mares competing, 3)to get foals from physically unsound mares and 4)to maximize the number of foals a mare can produce. Embryo transfer is a technical and management intensive procedure. Timing is essential to su ...
X X
... A3. Represent examples for types of interrelationships between different organisms and their embryonic development. A4. List theories and methods applied for interpreting and analyzing data related to embryology. A5. Illustrate developmental progress of the embryology -related knowledge. B2. Assess ...
... A3. Represent examples for types of interrelationships between different organisms and their embryonic development. A4. List theories and methods applied for interpreting and analyzing data related to embryology. A5. Illustrate developmental progress of the embryology -related knowledge. B2. Assess ...
DEVELOPMENT OF JAPANESE QUAIL (Coturnix - E
... (Saraswati et al., 2013a). Average-sized eggs that will be hatched 11-13 grams. The normal size can be achieved after quail reaching age 2.5 month. Thus making quail eggs held since quail was 2.5 to 8 months (Jatoi et al., 2013). Beside having high nutrition meat, Quail meat can be used as an altern ...
... (Saraswati et al., 2013a). Average-sized eggs that will be hatched 11-13 grams. The normal size can be achieved after quail reaching age 2.5 month. Thus making quail eggs held since quail was 2.5 to 8 months (Jatoi et al., 2013). Beside having high nutrition meat, Quail meat can be used as an altern ...
Pregnancy and birth resulting from transfer of a blastocyst observed
... Institute of Reproduction and Development, Monash University, Clayton, Victoria, Australia, 3168 ...
... Institute of Reproduction and Development, Monash University, Clayton, Victoria, Australia, 3168 ...
Embryo and Fetal Pathology
... embryo – Diseases – Diagnosis – Atlases. 3. Fetus – Abnormalities – Atlases. 4. Ultrasonics in obstetrics – Atlases. 5. Embryology – Atlases. I. Spicer, Diane Debich. II. Title. RG626.G34 2003 ...
... embryo – Diseases – Diagnosis – Atlases. 3. Fetus – Abnormalities – Atlases. 4. Ultrasonics in obstetrics – Atlases. 5. Embryology – Atlases. I. Spicer, Diane Debich. II. Title. RG626.G34 2003 ...
New concepts in embryonic growth and
... daily in virtually all IVF clinics, so the embryologist does not know of an embryo cleaved 1 h before it was examined, or 23 h before. How can cleavage or fragmentation be fully judged under this once-daily regimen? This is an important matter because cleavage history is fundamental in identifying t ...
... daily in virtually all IVF clinics, so the embryologist does not know of an embryo cleaved 1 h before it was examined, or 23 h before. How can cleavage or fragmentation be fully judged under this once-daily regimen? This is an important matter because cleavage history is fundamental in identifying t ...
Monster
A monster is any creature, usually found in legends or horror fiction, that is often hideous and may produce fear or physical harm by its appearance and/or its actions. The word ""monster"" derives from Latin monstrum, an aberrant occurrence, usually biological, that was taken as a sign that something was wrong within the natural order.The word usually connotes something wrong or evil; a monster is generally morally objectionable, physically or psychologically hideous, and/or a freak of nature. It can also be applied figuratively to a person with similar characteristics like a greedy person or a person who does horrible things.The root of ""monstrum"" is ""monere""—which does not only mean to warn, but also to instruct, and forms the basis of the modern English demonstrate. Thus, the monster is also a sign or instruction. This benign interpretation was proposed by Saint Augustine, who did not see the monster as inherently evil, but as part of the natural design of the world, a kind-of deliberate category error.