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Cells from both the mesodermal and the ectodermal tissues contribute to the formation of the eye. Specifically, the eye is derived from the neuroepithelium, surface ectoderm, and the extracellular mesenchyme which consists of both the neural crest and mesoderm. [2] [3] [4] Neuroepithelium forms the retina, ciliary body, iris, and optic nerves.
Mesenchyme is characterized morphologically by a prominent ground substance matrix containing a loose aggregate of reticular fibers and unspecialized mesenchymal stem cells. [5] Mesenchymal cells can migrate easily (in contrast to epithelial cells, which lack mobility, are organized into closely adherent sheets, and are polarized in an apical ...
Mesenchymal stem cell. See Mesenchymal stem cell. Osteochondroprogenitor cell. Bone (Osteoblast → Osteocyte) Cartilage (Chondroblast → Chondrocyte)
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device.
Mesenchymal cells, on the other hand, lack this polarization, have a spindle-shaped morphology and interact with each other only through focal points. [4] Epithelial cells express high levels of E-cadherin, whereas mesenchymal cells express those of N-cadherin, fibronectin and vimentin. Thus, EMT entails profound morphological and phenotypic ...
These stem cells are from the limbus, a zone of tissue around the cornea that generates transparent cells that protect and heal the eye’s surface. Chemical burns and accidents can result in ...
Amniotic stem cells are the mixture of stem cells that can be obtained from the amniotic fluid [1] [2] as well as the amniotic membrane. [3] They can develop into various tissue types including skin, cartilage, cardiac tissue, nerves, muscle, and bone. [4] The cells also have potential medical applications, especially in organ regeneration. [5]
Mesothelioma: (cancer of the mesothelium) is a disease in which cells of the mesothelium become abnormal and divide without control or order. They can invade and damage nearby tissues and organs. Cancer cells can also metastasize (spread) from their original site to other parts of the body. Most cases of mesothelioma begin in the pleura or ...