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Biomedical subjects

M R Sapin

Publications and source records attributed to M R Sapin.

At least 55 records · Page 3Linked to original sources
PubMed1993

[The effect of physical loads of differing intensities on the lymphoid tissue elements of the thymus and spleen].

The amounts of blast, large lymphocytes and mitotically divided cells were histologically and morphometrically studied in the thymus and spleen in 24 BALB/c female mice during exercises of varying intensity which were induced by swimming and during restricted mobility. The latter was found to cause a greater increase in the above cells in the spleen. The similar changes, though less pronounced, were noted in the thymus during intensive exercises. Moderate exercises and restricted mobility led to a reduction of the number of divided cells in the thymus, but doubled blasts and large lymphocytes.

Animals↗
PubMed1992

[Anthropological approaches in human anatomy].

Principles of anthropological methodology used by human anatomy have been formulated as the elucidation of forms and factors of variability of structures and their correlation in the integral organism. Under consideration was the use of different morphological signs for their integral estimation of the condition of the human body. The realization of these principles in research represents an anthropological trend in human anatomy. Its advantages in 1980s were preceded by the preliminary development of certain problems of anatomical anthropology by our national and foreign scientists. A review of researches on anthropological trends of human anatomy is given which were considered as a basis for the further development of medical and sports anthropology.

Anatomy↗
PubMed1992

[The anatomy and topography of lymphoid clusters in the walls of the human pharynx in postnatal ontogeny].

A macro-microscopic investigation was performed on preparations of the pharynx from 110 corpses of people practically healthy in their life-time. Lymphoid accumulations (prenodules) by the rhinopharynx are disposed mainly in the area of salpingo-pharyngeal folds and between them, in the oral part of the organ--near salpingo-pharyngeal folds and in the posterior wall. In children the lymphoid accumulations by laryngopharynx are found near the middle line of the posterior wall, while in adult people they are concentrated in the area of piriform recesses. In the rhinopharynx walls the lymphoid accumulations are adjacent immediately to the basal layer of the epithelium, by the oral and laryngeal parts of the organ they are disposed closer to the muscular layer. The maximum quantity of the lymphoid accumulations was observed in early childhood, it was twice lower in senile people. The greatest sizes of them were noted in juvenile age.

Adolescent↗
PubMed1991

[Perivascular lymphoid nodules].

As a result of investigation of lymphoid formations in the walls of the human tracheobronchial tree and the pulmonary stroma by means of morphological and morphometrical techniques, certain regularity in arrangement of the perivascular lymphoid noduli has been stated along the course of the lympho- and hemomicrocirculatory bed links. The periarterial lymphoid noduli of the tracheobronchial tree have certain morphological similarity and some differences, when comparing them with usual lymphoid noduli.

Adolescent↗
PubMed1991

[The anatomy and topography of the lymphoid formations of the human stomach in postnatal ontogeny].

By means of macro-microscopical methods 80 stomachs from persons of various age have been studied. In the mucous membrane of the human stomach during all age periods of postnatal development the lymphoid tissue is present as diffusely scattered lymphocytes, their microaccumulations and lymphoid noduli. Maximal amount of the lymphoid noduli is observed during the second mature age. The greatest number of the lymphoid noduli per 1 cm2 of the mucous membrane surface is revealed in the area of the lesser curvature and in the pyloric part of the stomach. Most often the lymphoid noduli are situated in the depth of the lumen proper of the mucous membrane, somewhat more seldom--in its more superficial parts, in the muscular lamina and in the submucous tela. The lymphoid noduli with germinative centers are met beginning from the first childhood up to old age. The greatest amount of diffusively scattered lymphocytes is situated near the lymphoid noduli and in the deep layer of the lamina proper of the mucous membrane.

Gastric Mucosa↗
PubMed1990

[Cytological structure of splenic white pulp in persons of different age].

Spleens (27) obtained from human corpses (from 1 year up to 85 years) have been investigated. By means of morphometrical grid amount of cells in the periarterial lymphoid muffs (PLM) and in marginal zones (MZ) of the spleen have been counted. In both structures of the white pulp small lymphocytes make the greatest number. Middle lymphocytes in comparison to the small ones are 1.5-4 times less in most of the age groups investigated. Amount of plasma cells is small. The part of reticular cells is 21-46% in MZ and 20-36% in PLM from the total amount of cells. In PLM immediately around the artery tightly packed to each other small lymphocytes are situated. Among small lymphocytes reticular cells are situated. A similar arrangement of cells is kept along the whole thickness of PLM. In MZ distance between cells of the lymphoid line is a little greater than in PLM. To singularly situating reticular cells small and middle lymphocytes are immediate neighbours. Plasma cells, as a rule, occur seldom; either middle lymphocytes, or reticular cells adjoin them. Sometimes, in PLM and MZ macrophages occur; they are situated in the areas free from other cells.

Adult↗
PubMed1990

[Local characteristics and interrelations between glands and lymphoid conglomerations in the esophageal wall].

Proper glands in 248 total preparations and lymphoid accumulations in 112 preparations have been investigated macro-microscopically in the human oesophageal preparations at various age. The organs have been obtained from 152 corpses of persons died from the death by violence and having no pathological changes in the organs of digestive and immune systems. The lymphoid tissue in the oesophageal wall is presented as accumulations of cells (prenodules++) and as diffusely scattered immune-competent cells. The glands and lymphoid accumulations are oriented as longitudinal rows. The lymphoid tissue accumulations are situated near to the glandular ducts, because the latter can serve as pathways for penetrating antigenic material into the organ's wall. The amount of the glands is maximal mature and elderly age, and that of lymphoid accumulations--at the second childhood. The dimensions of the gland body increase in the cranio-caudal direction, while the lymphoid accumulations, just the reverse, have their maximal dimensions in the upper third of the oesophagus. The gland bodies in places of the organ's anatomical narrowings in the section have more alveoles and are situated nearer to the covering epithelium than the glands in the neighbouring areas of the wall.

Adult↗
PubMed1989

[Macro- and microscopic characteristics of the glands of the human trachea and main bronchi in postnatal ontogenesis].

By means of the macro-microscopical method 68 preparations of the trachea and main bronchi, obtained from persons perished and died at the newborn age up to 90 years and having not any disease of the respiratory pathways by the time of death have been studied. The glands in the walls of these organs are adapted to the surrounding structures and have various topography in the cartilagenous and membranous parts of the trachea and main bronchi. The ductal openings in the membranous part demonstrate a regular longitudinal orientation. Despite the fact that during human life the sizes of the trachea and main bronchi increase, the amount of the glands during the postnatal ontogenesis remains nearly at the same or about the same level. With age, the density of the ductal opening arrangement per 1 cm2 of the mucosal membrane surface changes noticeably. Comparing with the newborn age, in the old age this parameter decreases nearly by 4 times.

Adult↗
PubMed1989

[Individual and age variability of the anatomy and topography of the human lymph nodes].

Analysis of the author's and literature data revealed two peculiarities in the lymph node anatomy. One of them is characterized with a great variability of amount and size of the nodes in every regional group. The second peculiarity is that age involution of the lymphoid tissue in the nodes is demonstrated in elderly and old persons as a decreasing amount of the lymph nodes and as their enlargement.

Adult↗
PubMed1989

[The immune system and age].

Basing on numerous facts, obtained during last years at investigation of the immune system organs, a definite idea has been formed on peculiarities of their structure during certain stages of human ontogenesis. The immune organs appear early in embryogenesis and by birth they have reached their morphological maturation. This is evident as formation of diffuse lymphoid tissue in lymphoid noduli, that can have germinative centers, where young cells of the lymphoid line are formed. The immune system organs develop especially quickly after birth during first years of the postnatal ontogenesis. The peak in development of the organs of immunogenesis, amount and size of the lymphoid noduli occurs during the childhood and adolescent age. Each immune organ has its peculiarities that are determined by their place in the organism, value and intensity of antigenic effect. Beginning from the adolescence and youth amount of the lymphoid tissue and lymphoid noduli in the organs decreases, in their place connective and adipose tissue grows out.

Aging↗
PubMed1989

[Age-related aspects of the anatomy and topography of the human tubal tonsil].

The tubal tonsil (TT) has been investigated in 60 preparations of the auditory tube (right and left), obtained from 30 corpses of persons at various age, those died from traumas and having neither any pathological changes in their acoustic organs, nor chronic inflammatory diseases by the time of death. The TT is presented as a solid or interrupted lymphoid tissue plate, situating in the mucosal membrane in the area of the pharyngeal opening to some extent in the inferior, posterior and anterior walls of the auditory tube. In newborns the TT is presented as a diffuse lymphoid tissue, where lymphoid nodules begin to form. The greatest amount of the lymphoid nodules in the TT are revealed in the infantile age and this sign is kept during subsequent age periods, including the first period of mature age. During these age periods on the surface of the mucosal membrane in the area of the pharyngeal opening numerous small eminences are seen--tubercles, corresponding in their position to lymphoid nodules under them. Beginning from the second mature period and up to old age the amount and size of the lymphoid nodules in the TT decreases. At that time on the surface of the mucosal membranes in the area of TT only single tubercles are revealed.

Adult↗
PubMed1988

[Ellipsoids of the spleen (ellipsoid macrophagal-lymphoid sheaths].

The ellipsoids of the spleen are considered as one of the links of the immune (lymphoid) apparatus of the lymphoreticular organ. Anatomical peculiarities of interrelations between the wall of the terminal part of the arterial bed, capillary, ellipsoid macrophagal-lymphoid microenvironment and reticular stroma of the ellipsoids of the spleen are discussed. Certain ultrastructural and immune-histological differences in the structure of the endothelial lining and cells, forming the ellipsoid sheaths, demonstrate functional interconnection of these formations not only with regulation of blood stream in the spleen vascular bed, but with transport of the antigenic material and lymphocytes into the white pulp. However, the functional appointment, as well as using of terminology of these formations still remain to be cleared out. An analogy is made, concerning the function of the splenic ellipsoid sheaths and postcapillary venules of the lymph node. The formation of the structural mechanism of immune response to the antigen-antibody complexes are analyzed, using some examples of evolutionary development of the ellipsoid macrophagal-lymphoid sheaths in various animal species.

Humans↗
PubMed1988

[Lymphoid nodules of the urinary bladder in man].

Basing on macro- microscopical investigation of the urinary bladder in 94 persons, died at the period of birth up to old years and by the time of death having not any disease of the urinary apparatus, structure and topography of the lymphoid nodules, their amount, density of distribution in the mucous membrane of various parts of the organ have been studied. The germinative centers in the lymphoid nodules of the urinary bladder are not revealed. The external appearance of the nodules is not the same; some have clear contours others have no clearly manifested borders. We call them prenodules. The lymphoid nodules are situated near to each other without any definite order. And only near the ureteral openings they are always revealed in a small amount, in the area of the triangle; they are oriented, as a rule, from the ureteral openings towards the exit from the urinary bladder. The amount of the lymphoid nodules in the organ's wall varies (at an average) from 18, in newborns, up to 415, in adolescents, and up to 129, in old persons. Distribution density of the lymphoid nodules in the fundal area of the urinary bladder is somewhat greater, than in its superior parts. The size of the lymphoid nodules during all age periods is not more than 900 mcm.

Adolescent↗
PubMed1988

[Lymphoid formations of the spleen in persons of different ages].

Histological preparations of the spleen obtained from 64 corpses of persons of both sex and various age died from traumas, asphyxia, acute cardiac ischemia have been investigated. Microscopical anatomy of the spleen lymphoid formations has been described at various age periods, as well as structural interrelations of periarterial lymphoid muffs and lymphoid nodules with each other, with arteries and trabeculae. The periarterial lymphoid muffs embrace the splenic arteries immediately as they leave the trabeculae and get into the periarterial zones of the lymphoid nodules. The data have been obtained on relative contents of the main splenic structural components and on size of the lymphoid nodules and their germinative centers at various age in accordance with the modern age periodization, intensity of the age factor influence on these parameters is demonstrated. Problems of morphofunctional interrelations of certain splenic structures are discussed.

Aging↗