Uterine closure involves mild generalised oedema and reabsorption of luminal fluid. The J3 larvae grow and molt while burrowing in the epithelium toward the luminal surface. The most distinctive characteristic of the proximal tubule is its luminal brush border. It is accomplished via selective receptors on the luminal cell membrane. The luminal surface is covered with microvilli. Increases in aldosterone increase expression of luminal sodium channels. The cilia are hair-like, microtubular-based structures on the luminal surface of the epithelium. VRs on the luminal membrane of the collecting duct limit the antidiuretic action of vasopressin. These glycoproteins, glycolipids, and enzymes catalyze the final digestive stages of luminal carbohydrates and proteins. FODMAPs cause digestive symptoms when the person is hypersensitive to luminal distension. Very advanced luminal occlusion usually produces a heart attack. Level of pain is related to the degree of luminal occlusion. It is poorly absorbed from the gastrointestinal tract and is used as a luminal amebicide. In general, they can be genetically classified into basal and luminal subtypes. It appears as an irregular yellow-white discoloration on the luminal surface of an artery.