Embryonic development involves the progressive restriction of the fates of initially pluripotent cells to different cell types, arising at the correct locations in the embryo and at the right time. From: Encyclopedia of Neuroscience, 2009 About this pageSet alert ...
When you actually take time to think about how delicate, organized, and complicated living things are. So many things have to be just right for a living being to develop. In humans, the early stages of development are spent inside the mother's body where she can protect and nourish her ...
The explanation of uterine and vaginal embryogenesis in humans still poses many controversies, because it is difficult to assess early stages of an embryo. The literature review revealed many disagreements in Mullerian theory, inciting some authors to propose new embryological hypotheses. In the ...
In sex development we can distinguish two different processes: First, sex determination is the developmental decision that directs the undifferentiated embryo into a sexually dimorphic individual. In mammals, sex determination equals gonadal development. The second process known as sex differentiation takes...
20192018). Organoid formation should ideally mimic the organ development in its entirety as in the embryo/fetus, but the timing and concentration of various growth factors involved makes it difficult to generate the organoids that match the organs exactly (Kim et al.2020). Another challenge being...
Table 4.1.Stages of ovarian development in lizards (compiled fromAustin, 1988; Doddamani, 1994; Neaves, Wapstra, Birch, Girling, & Joss, 2006). Embryo stages aresensuDufaure and Hubert (1961) StageEmbryonic stageGonadal componentDescription ...
Central Nervous SystemChick EmbryoAnimalsMammalsHumansInvertebratesNeural Tube DefectsAnencephalyMeningomyeloceleNerve Tissue ProteinsThe authors review current views ... MS Dias,M Partington - 《Neurosurgical Focus》 被引量: 80发表: 2004年 Differentiation, Ramification and Distribution of Microglia within th...
The prevalence of aneuploid cells in miscarried human embryos is higher than previously quoted. Genomic imbalances seem to be less tolerated in the embryoblast than the trophoblast, which indicates that allocation of aneuploid cells to the inner cell mass during blastocyst formation might have a detri...
The in vitro culture system provides a platform for primate embryo studies and is expected to help bring more understanding to the early development of human embryos, especially abnormal pregnancy and fetal abnormalities, he said.
In mammals, dosage compensation for X-linked genes between males and females is achieved by the inactivation of one of the X chromosomes in females. The inactivation event occurs early in development in all cells of the female mouse embryo and is stable and heritable in somatic cells. However,...