Several minerals are required for life to exist. In animals, 7 elements (Ca, P, Mg, Na, K, Cl,
and S) are required to be present in the diet in fairly large amounts (grams to tens of grams …

The choroid plexus epithelium is a cuboidal cell monolayer, which produces the majority of
the cerebrospinal fluid. The concerted action of a variety of integral membrane proteins …

The two major interfaces separating brain and blood have different primary roles. The
choroid plexuses secrete cerebrospinal fluid into the ventricles, accounting for most net fluid …

Intercellular junctions mediate adhesion and communication between adjoining endothelial
and epithelial cells. In the endothelium, junctional complexes comprise tight junctions …

Whether or not significant amounts of water pass the tight junction (TJ) of leaky epithelia is
still unresolved, because it is difficult to separate transcellular water flux from TJ-controlled …

The kidney plays a fundamental role in maintaining body salt and fluid balance and blood
pressure homeostasis through the actions of its proximal and distal tubular segments of …

The nutrition of the intraocular tissues is accomplished by the retinal vessels, the uveal
vessels, and by the aqueous humor. Both morphologically and physiologically the retinal …

Intestinal subepithelial myofibroblasts (ISEMF) and the interstitial cells of Cajal are the two
types of myofibroblasts identified in the intestine. Intestinal myofibroblasts are activated and …

ABSTRACT HRP has been used as a cytochemical marker for a stereologic analysis of
pinocytic vesicles and secondary lysosomes in cultivated macrophages and L cells …

At the ultrastructural level, epithelia performing solute-linked water transport possess long,
narrow channels open at one end and closed at the other, which may constitute the fluid …