The Development of Blood and Lymph Vessels of Human Parathyroid Glands in Embryonal, Fetal and Postnatal Period

The aim of the article is to investigate the development of blood and lymph systems in human parathyroid glands in prenatal and postnatal periods. The first capillaries are observed in these glands already in the lunar month 2. At the middle of pregnancy blood supply is increased, being extremely abundant in lunar months 9 and 10, as well as during the first year of life. As parts of the lymph system, intercellular lymph spaces are noticed in the parathyroid glands already in the lunar month 2, and also later, when lymph vessels are situated along the gland or in its connective capsule and within the gland parenchyma respectively. All these findings could be connected with the early function of these glands, as well as with the possibility that parathyroid hormone (PTH) is not transferred by blood only but by lymph as well

Model for Computer Simulation of Bone Tissue

The paper deals with the dependence of the torsional moment on the angle of the compact bone torsion in laboratory animals and humans. Based on the data for laboratory animals obtained by measurements, the data on dependence of the torsional moment and the angle of torsion were predicted for humans. The measurements were carried out in four groups of laboratory animals. One was the control group, and the other three groups were treated by various vitamin D3 metabolites. The same measurements were performed also in only one group of humans, due to the impossibility to treat humans with vitamin D3 metabolites. The functional relationship between the angle of torsion and the torsional moment for all the groups of animal bone tissue were determined by measurements, and results were used to predict the reaction of the human compact bone tissue if treated by vitamin D3 metabolites

Schwermetalle und Biologishe systeme mit besonderer Berucksichigung des Quecksilbers

U radu su ukratko opisani djelovanje teških metala na biološke sustave, opasnost nekontrolirane primjene radi kontaminacije okoliša, kao i mogućnost intoksikacije humane populacije kadmijem, olovom i živom. Dat je nešto opširniji prikaz metabolizma žive i njezinih spojeva u organizmu, primjene žive u stomatologiji, a navedene su i opasnosti od eventualne intoksikacije. Isto tako, izneseni su eksperimentalni rezultati, dobiveni djelovanjem živinog biklorida na strukturu poliribosoma stanica bubrega miša, kao i patološka slika djelovanja istoga spoja na tkivo bubrega miša, u vremenu od jednog sata, nakon interaperitonealno aplicirane doze.The paper gives a short description of the effects of heavy metals on biological systems pointing at the risks of environmental contamination due to uncontrolled application and to possible intoxication of human population by cadmium, lead and mercury. The metabolism of mercury and its compounds in the organism, its application in dentistry and possible risks of poisoning are discussed in more details. The experimental results obtained by the effect of mercuric chloride on the polyribosome structure of the renal cells in mice are also presented along with the pathohistological picture of the effect of same compound on the renal tissue of hte mouse observed one hour after an intraperitoneally administered dose.In dieser Arbeit wird die Wirkung der Schwermetalle auf biologische Systeme, die Gefahr der unkontrollierten Anwendung inbezug auf die Verschmutzung der Umwelt, und die Möglichkeit der Vergiftung der humanen Population mit Kadmium, Blei und Quecksilber, vorgebracht. Etwas ausführlicher wird der Metabolismus des Quecksilbers uns seiner Verbindung im Organismus, die Verwendung des Quecksilbers in der Stomatologie, und die Gefahr einer eventuellen Vergiftung, dargestellt. Uusserdem werden die experimentallen Resultate über die Auswirkung des Quecksilberbichlorids auf die Struktur der Nierenzellen-PoHribosomen von Mäusen, sowie das pathohistologische Bild der Wirkung derselben Substanzen auf das Nierengewebe von Mausen, eine Stunde nach der intraperitonealen Verabreichung, beschrieben