What is an ectoderm?
ectoderm is an outer layer of embryo embryos. In this form, it is in its initial stages before developing into the tissue that covers the body. It is one of the three primary germics, other layers are mesoderm and endoderm. Ectoderm develops the nervous system, external sensory organs as well as hair and skin glands. Surface ectoderm is responsible for the development of crystalline lenses, meibomic glands and an epidermis of the lid. Surface ectoderm also consists of skin, tooth enamel and mucous membrane of the mouth. This development usually begins in people during the fourth week of life development and continues the second trimester. This part of the ectoderm contains a nerve tube that is responsible for the development of the central nervous system. The neural tube is considered a precursor to the spinal cord. Approximately 16. The Day of Development begins to form a nervous ectoderm and the nerve tube is usually made of 21. The anterior area of the brain, medium mobrain and rear brain are formed in the nerve tube. These three areas of the brain are again distributed during the seventh week of developmenther.
neural ridges are cells that form ciliary muscles, trabecular network and cornea. These cells also help in the development of parts of the skeletal system, autonomic nervous system and cells producing hormones. This part of the ectoderm is located between the epidermis and the nerve tube. In fact, the neural ridge consists of embryonic cells that are cut off during development.
nerve ridge cells do not remain as part of the central nervous system. Instead, these cells move throughout the body to different places to contribute to the development of other different structures. Cell movement is very complex and controlled by inhibitory signals from other cells. Neural cells contribute to the development of bones, cartilage and connective tissues.
cells that migrate from the nerve ridge contribute to the ability of the brain to continue to grow into adult phases of development. Gli cells develop and onFurthermore, they are divided and multiply. These cells are insulated by brain nerve cells to support the function of the brain after birth.