SOME HISTOLOGICAL OBSERVATION OF THE EYE IN THE FISH (Mystus pelusius)

The eyes of 50 fishes (Mystus pelusius) were located in protective myodome of the skull and were basically made up of an elongated globe. The comeal epithelium was composed of stratified squamous non-keratinized. The iris bends sharply inward over the lens and consisted of richly vasculared connective tissue stroma and a pigmented epithelium. The sclera was cartilaginous. The choroid was made of connective tissue and containing choriocapillaris. Longe single, short single and double cones and rods was the characteristic feature of the retina.

ULTRASTRUCTURE OF THE ABDOMINAL PLEXUS OF RATS DURING HERBICIDE INTOXICATION AND TREATMENT

As a result of the study, it was found that poisoning of rats with the herbicide 2,4 - DA for 4 weeks causes a decrease in the number of neurocytes in the celiac plexus, changes the protein synthesizing and energy systems of the cell, and accumulates residual structures in the form of lipofuscin. In the neuroplasm, the number of neurofilaments and neurotubules decreases, the organization of the myelin layer of fibers is disrupted. Changes affect the structure of the intima and media of blood vessels, leading to a violation of their transport function. When rats are treated with Taktivin, they show positive dynamics in the structure of the celiac plexus; the protein-synthesizing system is restored in the nuclei and neuroplasm of a number of cells. In the connective tissue stroma, the ultrastructure of collagen fibers improves, and the number of blood vessels increases.

Показники кореляції між площею кровоносних судин і тканинних компонентів тимуса телят

Tissue components, intraorganic blood vessels and indicators of correlation between the area of these structures in the thymus of 1, 5, 10 and 20 day-old calves were investigated. Newborns calves at birth had different morphofunctional status. Thymic blood vessels are represented as interlobular and intralobular blood vessels as confirmed by other authors. In the cortical portion blood vessels were branching radially, in the medullary portion they formed a polygonal plexus. In 1-day-old calves of average morphofunctional status the area of organ’s parenchyma was less and the area of connective tissue stroma was bigger than in the calves of high status. This indicates the delay of thymus formation as an organ and suppression of its functional activity in calves of average morphofunctional status. In this case, the area of thymic blood vessels of 1-day-old calves of high morphofunctional status was bigger than of average morphofunctional status calves. The area of thymic parenchyma in calves up to 5-days old was increasing, and the area of connective tissue stroma was reducing. Characteristically, the area of parenchyma and stroma in the calves of this age reached the values that calves of high morphofunctional status had. In older calves the area of parenchyma was slightly decreasing and the area of stroma was increasing. Our studies showed that the correlative relationships between the area of blood vessels and tissue components of thoracic part of thymus of calves with different morphofunctional status were variable in the firmness and character. In thoracic part of thymus of 1-day-old calves with high morphofunctional status of the body the correlative relationships between the area of blood vessels and tissue components were tight and reversible. Their firmness was slightly less in calves of medium status. With increasing of calves’ age the correlative relationships changed asynchronously in firmness and character: in 5- and 10-days-old calves they were tight, weak and reversible, and in 20-days-old calves they were tight, positive and reversible.

Traumatic neuroma of mental nerve following lower lip mucocele excision

Traumatic neuroma represents reactive hyperplasia of irregularly positioned Schwann neurofibril cells and connective tissue - stroma that develop as a result of unsuccessful attempts to regenerate peripheral nerve after injury. This paper presents the case of a patient with painless traumatic neuroma of the lower lip formed in the same place where he previously had surgically removed salivary cyst of minor salivary gland - mucocele. Histopathological examination confirmed the diagnosis of traumatic neuroma.

Cartilaginous Choristoma of the Gingiva: A Rare Clinical Entity

Choristomas are rare entities which are aggregates of microscopically normal cells or tissues in aberrant locations. They are a “heterotopic” rest of cells, as they appear as a tumor-like mass. Herein we report a case of cartilaginous choristoma in a 54-year-old male who presented with a swelling on right lower gingiva. The histopathological examination revealed features of a well circumscribed mass of mature cartilage in a dense fibrous connective tissue stroma.

Structured pancreas changes in deadaptation process to high altitude

Study of the pancreas of the rats at different periods deadaptation to valley, after 60 day adaptations to mountain has revealled significant change, which at the first periods of the study (7, 15 day) were concluded in edema stroma, inflammatory round cells, plethora container and grousing connective tissue between share and around acinus. At late periods of the study dominated change, expressing grousing connective tissue stroma ferrics with atrophy acinus parenchyma and dystrophic change acinous hutches (picnosis, vacuolization of cytoplasm). Deadaption has found the weakening an compensatory reaction with prevalence destruction processes in pancreas.