Preliminary Study Regard Histopathological Tissue Changes Associated to EDTA Experimental Exposure in Prussian Carp (Carassius Gibelio)

The aim of the current study was to describe possible histopathological lesions induced by EDTA using as chelating agent in prussian carp (Carassius Gibelio) species. 80 healthy prussian carp specimens were collected from a local pond and acclimated for two weeks in laboratory conditions. Acclimated fish were housed in a 60 l capacity glass aquariums (20 fishes/aquarium) and divided into four groups: control group was maintained in EDTA-free freshwater, EDTA1 group receiving 0.05 g EDTA/l in water, EDTA2 group receiving 0.1g EDTA/l in water and EDTA3 group receiving 0.15 g EDTA/l in water. After a 21 days exposure to doses of EDTA above mentioned, some fish tissues were sampled and processed for microscopical examination. Compared to the control specimens, severe structural and functional alterations were identified in gills, liver and kidneys of fish exposed, including totally disorganized aspect of gill lamella with detached and dystrophic epithelium, intense fibrosis in the walls of arterioles, venules and gallbladder channels, denudation and necrosis processes of renal corpuscles respectively

Morpho-histological Studies on the Male Genital Apparatus of Chinchilla laniger

The histological studies of the male genital apparatus of the Chinchilla Laniger are scares and incomplete. Due to the studies done on the male genital apparatus of Chinchilla Laniger it has been determined that the seminiferous tubes are separated by large conjunctive septum; the seminiferous epithelium varies from one tissue to another, aspect that suggests different stages in the spermatogenesis process. The epididymis channel is made up of pseudo-layered epithelium, a reduced lamina propria and a delicate muscular layer. The deferent channel wall is made up of three tunics: mucous, muscular and adventitia. The muscular tunic is the most developed part and is made up of three super posed layers of even smooth muscle cell. The histological sections done on the pelvic urethra reveals the following components: mucous, vascular layer, muscular and adventitia. The transversal sections done on the free extremity of the penis reveal the presence of the foreskin made up of three layers: tegument or external, parietal or visceral. The vesicular glands (seminal) have an intestine shaped aspect and are sustained by their own ligament, richly vascularised. The transversal section reveals a tubular aspect, the wall of these tubes is made up of: mucous, muscular and adventitia. The prostate is made up of an external part and an internal part, and is covered in a thick conjunctive-muscular capsule

Morpho-histological Study of the Digestive Tract and the Annex Glands of Chinchilla laniger

No detailed histological study of the segments of the digestive tract and of the post-diaphragmatic annex glands of Chinchilla laniger is available in the literature, to our knowledge. The study presented draws attention to the morphological characteristics of the digestive tract and their involvement in the digestive process, with important implications for the composition of formula diets. Histological study of the digestive tract and annex glands (liver and pancreas) of Chinchilla laniger shows no major differences from other mammals. The walls of the oesophagus, stomach and intestine are composed of four layers: the mucosa, sub-mucosa, muscularis mucosa and serosa (the fourth layer of the oesophagus being called the adventitia). A noteworthy feature of the species is the generous development of the caecum in proportion to body size, a characteristic shared with other rodent species