What is a nerve ridge?
neural ridge is a group of cells created very soon into the embryonic development of all vertebrates. It is formed in a process called non -surul, which also begins with the formation of the defining characteristics of vertebrates - brain and spinal cord protected by the skull and spine. Nerve ridge cells develop into other features unique to vertebrates, such as the shape and structure of the head. Only twenty days after development, the embryo is still a relatively undifferentiated hollow ball, its wall only three thick cells. During the non -surulation, the outermost layer of cells is called ectoderm, clamped together. When the edges meet and the fuse, an extruded result is a hollow tube structure called the nerve tube. The neural tube eventually develops in the brain and spinal cord.>
After the nerve tube is completed, a group of cells responsible for the tight movement of the non -exterior movement is no longer needed. These are cells of the nerve ridge. It is free to move elsewhere in a young embryo. The process of neurulation has created the first distinctly differentiated structure of the peopleEmbryos. He also created mobile cells that migrate in many places to start developing into other body structures.
by marking cells of the nerve ridge of dyes, laboratory studies with other vertebrates found where they are going and what they happen. Some develop into heart tissue. The nerve ridge group becomes a nervous system that the brain uses to control internal organs of digestion. Other cells specialize in the production of melanin, a pigment that turns the skin, hair and eyes. Many cells do not migrate too much and begin to transform many bones of the head and their connective tissues.
Increases knowledge of what makes a nerve ridge at such an early stage of development when the embryo is still mostly formless ball. Scientists are busy studying questions as they do. A specific interest is how a free movable cell knows where to go. Once there is another interest of how it determines what type very muchSpecialized cells into which they have to evolve. Most research focuses on two likely factors of genetically coded directions in cells and chemical communication with other cells.