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The tissue is removed from the body or plant, and then, often following expert dissection in the fresh state, placed in a fixative which stabilizes the tissues to prevent decay. The most common fixative is 10% neutral buffered formalin (corresponding to 3.7% w/v formaldehyde in neutral buffered water, such as phosphate buffered saline).
Structure of Collagen I fibrils. Collagen is the major structural protein outside cells in many connective tissues of animals. [12] As the primary component of connective tissue, it has the largest amount among protein in mammals, occupying 25% to 35% of all protein content in the body. The fibrils in collagen are packed in a crimp structure.
Regional anatomy is the study of the interrelationships of all of the structures in a specific body region, such as the abdomen. In contrast, systemic anatomy is the study of the structures that make up a discrete body system—that is, a group of structures that work together to perform a unique body function, such as the digestive system. [10]
Martin L. Fackler (1933–2015) was an American military officer, surgeon and wound ballistics expert. He served in the U.S Navy from 1960 to 1975 and in the U.S. Army from 1975 to 1991. He was a field surgeon at the Naval Support Hospitals at Da Nang, Vietnam and at Yokosuka, Japan, and later a colonel in the US Army's Medical Corps. [1]
The H&E staining procedure is the principal stain in histology [3] [7] [2] [5] in part because it can be done quickly, [7] is not expensive, and stains tissues in such a way that a considerable amount of microscopic anatomy [9] [10] is revealed, [7] [5] [4] and can be used to diagnose a wide range of histopathologic conditions. [8]
A study on rats suggests that the three-dimensional structure of Sharpey's fibres intensifies the continuity between the periodontal ligament fibre and the alveolar bone (tooth socket), and acts as a buffer medium against stress. Sharpey's fibres in the primary acellular cementum are mineralized fully; those in cellular cementum and bone are ...
Davis's law is used in anatomy and physiology to describe how soft tissue models along imposed demands. It is similar to Wolff's law, which applies to osseous tissue. It is a physiological principle stating that soft tissue heal according to the manner in which they are mechanically stressed. [1]
The parenchymal cells are the functional units of an organ. In contrast, the stromal cells provide the structure of the organ and secrete extracellular matrix as supportive, connective tissue. [3] In normal epithelial tissues, epithelial cells, or parenchymal cells of epithelia, are highly organized, polar cells. [5]