[Histology of fetal lungs at different gestational age]. / Gistologiya legkikh ploda na raznykh srokakh beremennosti.
Arkh Patol
; 86(1): 65-71, 2024.
Article
en Ru
| MEDLINE
| ID: mdl-38319275
ABSTRACT
The lecture is devoted to the morphological characteristics of the maturation of lung tissue structures in the fetal period. Fetal histology of the lungs presents the intrauterine development of lung tissue in four successive stages pseudoglandular, canalicular, saccular and alveolar, each has specific morphological criteria. The following morphological features are predetermined the development of alveolar epithelium, the ratio of mesenchyme towards the area in alveolar spaces, the degree of proliferation and location of vessels of the microcirculatory bed towards prealveolar partitions. During the fetal period the alveolar columnar epithelium is flattened and differentiates into alveolocytes type I and II, the area of the mesenchyme gradually decreases and by the birth of a full-term newborn kid it is present mainly in the thickness between the alveolar septa, microcirculation vessels, initially laying deep in the thickness of the mesenchymal tissue, gradually proliferate, approach the pre-alveolar epithelium, channeling it with the formation of alveolar capillary membranes. Air exchange in the lung tissue is mainly provided with two factors the presence of second-order alveolocytes capable of producing surfactant, and a sufficient formation of alveoli as well. This work summarizes the basics of fetal lung histology with the demonstration of histological preparations of the lungs at different stages of intrauterine development.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Feto
/
Pulmón
Límite:
Humans
/
Newborn
Idioma:
Ru
Revista:
Arkh Patol
Año:
2024
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Rusia