What is hyaline layer?
What is hyaline layer?
post-fertilization In fertilization: Formation of the fertilization membrane. …a transparent layer, called the hyaline layer, which plays an important role in holding together the cells (blastomeres) formed during division, or cleavage, of the egg.
What is hyaline layer in dentine?
In tooth development, the hyaline layer of Hopewell-Smith is the most peripheral layer of initially unmineralized dentin that forms immediately subjacent to the cementodentinal junction (CDJ). The hyaline layer aids cementum in binding to the dentin.
Where is the hyaline layer?
It is created by the products secreted by the cortical granules. Underneath the fertilization envelope is the hyaline layer, which covers up sperm receptors in the egg’s plasma membrane.
What is the composition of cementum?
Cementum is slightly softer than dentin and consists of about 45% to 50% inorganic material (hydroxylapatite) by weight and 50% to 55% organic matter and water by weight. The organic portion is composed primarily of collagen and proteoglycans. The cementum is light yellow and slightly lighter in color than dentin.
What is hyaline color?
Color terms Clear, colorless, like window glass. Used for spores or other microscopic structures. Rod Tulloss believes that hyaline should simply mean transparent (like glass) without any requirement of colorlessness.
What hyaline means?
1 : something (such as the clear atmosphere) that is transparent. 2 or hyalin \ ˈhī-ə-lən \ : any of several translucent nitrogenous substances related to chitin, found especially around cells, and readily stained by eosin.
What is secondary cementum?
Secondary cementum (SC), which is hypothesized to develop when the tooth assumes occlusion and function, covers the remaining one-third of the root, and is thought to act predominantly as an occlusal load absorber during mastication [2, 8].
What is dental cementum?
Dental cementum is a living tissue that continues to grow throughout life. It is the calcified material that covers the outside of the tooth root, and provides the attachment site for the periodontal ligaments which hold the tooth to the alveolar bone within the socket.
What are the two types of cementum?
There are two types of cementum: acellular and cellular. Both consist of a calcified interfibrillar matrix and collagen fibrils. The cellular type contains cementocytes in individual spaces (lacunae) that allow for communication with each other through a system of canaliculi. There are two types of collagen fibers.
Why do I have hyaline casts in my urine?
Hyaline casts can be identified in both healthy individuals and those with certain pathological conditions. In most cases, they indicate a decreased or sluggish urine flow, which can be caused by dehydration from strenuous exercise, diuretic medications, or severe vomiting, or by decreased blood flow to the kidneys.