Organogenesis provisionally in the development of primary kidney
The results of the analysis of morphological and morphometric changes of nephrons in the stages of the vital cycle of primary kidney (PK) rights. Studied 118 embryos (Carnegie stage 12-23) and 28 fetuses (9-12 weeks of intrauterine life). It is shown that the vital cycle of PK is characterized by a landmark: the formation of the rudiments of nephrons, the differentiation of buds, the morphofunctional stability of the involution. Revealed three generations (G) is qualitatively different neprons of primary kidney. Nephronogenesis is saltatory in the proximal - distal vector. First (I) generate of nephrons do not contain vascular component, do not perform the function of urine formation, quickly atrophy by apoptosis. Second (II) generations of nephrons provide uropoiesis and form renal corpusculi  and canaliculi  which consists of four sections I-IV tubular type. Nephrons third (III) generation have megalotypical structure and model the possibility of compensatory hypertrophy metanephrons. Presents the morphometry values mesonephral corpusculi and canaliculi of the I, II and III nephrons generations.