The bracket of glands was constituted with collagen fibers and
reticular fibers. Due to muscularis mucosa embedding into the lamina propria, we could see more smooth muscle fibers at the bottom of glands in the lamina propria.
It was composed of loose connective tissue along with few elastic and
reticular fibers, which were arranged parallel to the endocardium.
These cells are covered by a thick sheath of
reticular fibers [10].
If there are emphysematous changes in the lung involving the loss of elastic and
reticular fibers from the release of excess trypsin from macrophages keyed by the response to particulate deposition, as in a smoker's lung, the bronchioles will not remain patent as the lung volume approaches residual volume (RV) and as the trans-pulmonary pressures increase.
(ii) Basement membrane (BM): Thick layer composed of network of
reticular fibers. These are interdigitations of short, blunt processes from the basal region of epithelial cells with similar basement membrane processes.