Gap junctions have been identified between cells in late passage cultures of human embryo fibroblasts using techniques of freeze-fracture and electron microscopy. The junctions are sparsely distributed, which may suggest a decrease in el... RO Kelley - 《Mechanisms of Ageing & Development》 被引量...
It is not a complete review and storehouse of information but an introduction helping the young students to form intelligent and connected mental pictures of the developing embryo. 3. Regions of the body are presented instead of structures or systems of structures. This method is followed partly ...
The morphology of the developing lateral pterygoid muscle and its relationships with the temporomandibular joint disc and Meckel's cartilage were studied in 16 human embryos and fetuses ranging in age from 5 weeks to 14 weeks. All the temporomandibular joint structures and the lateral pterygoid muscle...
Formation of the Human Embryo: The Third Week -- 5. Development of Tissues, Organs, and Body Form: The Fourth to Eighth Weeks -- 6. The Fetal ... KL Moore,TVN Persaud,MG Torchia - : * 被引量: 195发表: 1982年 A review of the metabolism and toxicology of nickel The toxicity, ca...
The first 2 weeks of prenatal development are referred to as the pre-embryonic stage. A developing human is referred to as anembryoduring weeks 3–8, and afetusfrom the ninth week of gestation until birth. In this section, we’ll cover the pre-embryonic and embryonic stages of development...
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...
On the origin of mitosis-derived human embryo aneuploidy Chromosome segregation errors are common in the early stages of human embryonic development. By examining the first mitotic divisions of human embryos using live cell imaging, three recent studies identify spindle architecture and positioning feature...
multiple roots in the dorsal aortas extends along the cranial wall of the cloaca towards the connecting stalk. This plexus represents the earliest stage in the development of the umbilical arteries. The configuration is remarkably similar to that reported by Tandler in a human embryo with 14 ...
A single-cell atlas of the human substantia nigra reveals cell-specific pathways associated with neurological disorders Introduction Parkinson’s disease (PD), symptoms and pathology PD is a clinical syndrome, identified by a combination of bradykinesia plus resting tremor or rigidity,1that is histopath...
We find that the mosaicism incidence is extremely high throughout human embryo-fetal development, and the results of our study underscore the need to apply more tolerance when deciding the utilization of mosaic embryos in the clinic. Results To comprehensively determine the genetic characteristics of ...