Neural development/Neurulation - Neurula - Neural folds - Neural groove - Neural tube - Neural crest - Neuromere (Rhombomere) - Notochord - Neural plate Mammalian embryogenesis is the process of cell division and cellular differentiation which leads to the development of a mammalian embryo. ... This article or section is in need of attention from an expert on the subject. ... The Human Nervous System The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions. ... The study of neural development draws on both neuroscience and developmental biology to describe the cellular and molecular mechanisms by which complex nervous systems emerge during embryonic development and throughout life. ... Neurulation is a part of organogenesis in vertebrate embryos. ... A Neurula is an embryo at the early stage of development in which neurulation occurs. ... In front of the primitive streak two longitudinal ridges, caused by a folding up of the ectoderm, make their appearance, one on either side of the middle line. ... Between the neural folds is a shallow median groove, the neural groove. ... In the developing vertebrate nervous system, the neural tube is the precursor of the central nervous system, which comprises the brain and spinal cord. ... The neural crest, a component of the ectoderm, is one of several ridgelike clusters of cells found on either side of the neural tube in vertebrate embryos. ... In the vertebrate embryo, a rhombomere is a segment of the developing rhombencephalon. ... The notochord is a flexible, rod-shaped body found in embryos of all chordates. ... The neural plate is thick and flat bundle of ectoderm which develops in the embryo into the nervous system. ...

Eye development - Optic vesicles - Optic stalk - Optic cup - Auditory vesicle - Auditory pit Transverse section showing the lens and the optic cup. ... The eyes begin to develop as a pair of diverticula from the lateral aspects of the forebrain. ... The optic vesicles project toward the sides of the head, and the peripheral part of each expands to form a hollow bulb, while the proximal part remains narrow and constitutes the optic stalk. ... The outer wall of the bulb of the optic vesicles becomes thickened and invaginated, and the bulb is thus converted into a cup, the optic cup (or ophthalmic cup), consisting of two strata of cells). ... The mouth of the auditory pit is then closed, and thus a shut sac, the auditory vesicle (or otic vesicle[1]), is formed; from it the epithelial lining of the membranous labyrinth is derived. ... The first rudiment of the internal ear appears shortly after that of the eye, in the form of a patch of thickened ectoderm, the auditory plate, over the region of the hind-brain. ...