We examined 35 species of ground and epiphytic lichens, including fruticose, foliose, crustose lichen, as habitats oribatid mites. Observations were carried out in the taiga forests northeast European Russia, 87 from 38 families found. The Crotoniidae, Carabodidae, Oppiidae, Suctobelbidae are most numerous lichens Oribatulidae epiphytes. Micreremidae Licneremaeidae only noted A complex characte...

This article has summarized parts of certain publica­tions about changes of hematopoietic elements, specially erythroid, during embryonic and fetal to the third postnatal life. The main purpose of this article is to familiarize medical students with the physiological characteristics of the blood system, chiefly in the first trimenon of postnatal life.  It is also aimed to prevent many incorrec...