A glance at Spanish embryology and teratology during the XX century through the academic life of Francisco Orts-Llorca (1905-1993).

Francisco Ort-Llorca (1905-1993) was one of the most outstanding Spanish embryologists of the XX century. He was disciple of Henri Rouvire in Paris (France), Alfred Fischel in Vienna (Austria), Walther Vogt in Munich (Germany) and Pedro Ara in Madrid (Spain). From 1935, he was professor of Human Anatomy at the Faculty of Medicine of Cadiz, belonged then to the University of Seville (accidentally, in the University of Valencia, during the Spanish Civil War from 1936-1939) and, later on, at the Faculty of Medicine of Madrid (Complutense University) from 1954 to 1975.

[Renal fusion in embryonic period].

In the present communication we present eight human embryos, understood between the 16 and 30 mm., carrier of renal half fusion -kidney in horseshoe-. We carry out a descriptive study based on fifty embryos of these stadiums (Collection Jiménez Collado), in order to establish the different normodifferenciative stadiums, as well as the possible schedule in which the malformation settles down, for finally to suggest possible mechanism-hypothesis that explain the presence of the renal half fusion.

[Angiogenesis and heart vasculogenesis].

The first sketch of coronary arterial vascularization settles down in human embryos of the stadium 14 of O'Rahilly starting from endothelial islands that contain dense eritoblastes formations that don't present connection with the cavity ventricular willing subepicardial. The presence of this primitive plexus is in intimate dependence with the Jelly acellular of Davies and not with the increase and structuring of the myocardium. Each coronary artery is developed starting from two anlages: one distal that makes it starting from the net subepicardial, and another proximal coming from the evagination of the endocardium of the breasts Valsalva.

A radioautographic analysis of the prospective cardiac area in the chick blastoderm by means of labeled grafts.

Grafting regions of the blastodisc of the chick, labeled with H-thymidine at Stages 5 and 6 ofHAMILTON andHAMBURGER, is a very useful technique for following the morphogenetic movements of the grafted material. Areas (E-M) of the blastodisc of 2.75 by 0.