Browsing by Author "Alim, A"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Electron microscopic studies of the corpuscles of Stannius of an airbreathing teleost (Heteropneustes fossilis).(2002-09-17) Ahmad, M Firoz; Alim, A; Sen, N S; Lakra, G; Mishra, K P; Raza, Bushra; Chakraborty, B; Rao, N V A; Bonga, S E WendelaarThe ultrastructure of the corpuscles of Stannius (CS) of Heteropneustes fossilis reveals a homogenous cellular composition characterized by only one cell type, with large secretory granules and abundant ribosomal endoplasmic reticulum. These cells are comparable to the type 1 cell described in the CS of other teleosts; type 2 cells, whose presence is ubiquitous in the CS of freshwater species are absent in H. fossilis. Our data on the CS of H. fossilis demonstrate that not all freshwater species possess type 2 cells in their CS and these are not essential for life in freshwaterItem Histomorphometric study of the human spleen.(2012-10) Alim, A; Nurunnabi, A S M; Mahbub, S; Ara, SContext: The spleen is the largest single mass of lymphoid tissue in all vertebrates. Histological changes are evident in advancing age along with functional capability of the human spleen. A cross-sectional, descriptive type of study was done in the Department of Anatomy, Dhaka Medical College, Dhaka, from January to December 2008, to see the age related microscopic changes in the human spleen. Methods: 30 human spleens were collected from the unclaimed dead bodies that were under examination in the Department of Forensic Medicine of Dhaka Medical College, Dhaka. The samples were divided into three age-groups including group A (15-29 years), group B (30-49 years) & group C (50-69 years). Then 5 best prepared histological slides from each group were taken and examined under the light compound microscope to determine the thickness of capsule, diameter, number and percent amount of white pulp in the human spleen. Results: The thickness of the splenic capsule were found 84.60±7.97 ?m, 117.92±4.16 ?m, and 132.17±6.37 ?m in group A, B and C respectively. The diameter of the white pulp were found 0.32±0.01 mm, 0.32±0.01 mm and 0.31±0.01 mm, while the number of white pulp per sq. mm were 2.28±1.04, 2.38±0.93 and 2.04±0.76 in group A, B and C respectively. Moreover, the amounts of the white pulp were determined 23.09±1.38, 24.45±1.84 and 22.54±1.08 in group A, B and C respectively. The difference in thickness of the splenic capsule was statistically significant among the study groups (p<0.001). However, no difference was found in diameter, number and percentage of the white pulp of the spleen among those age groups. Conclusion: The thickness of the capsule of the spleen was found to increase with advancing age in humans. However, no age change was evident in diameter, number or amount of the white pulp.Item Weight of the Human Thyroid Gland – A Postmortem Study.(2010) Nurunnabi, A S M; Alim, A; Sabiha, M; Manowara, B; Monira, K; Shamim, AContext: A cross-sectional study was designed to find out the difference in weight of the thyroid gland of Bangladeshi people in relation to age and sex and to compare with previous local and foreign studies. Materials & Methods: The present study was performed on 60 post mortem human thyroid gland (39 of male and 21 of female) collected from unclaimed dead bodies which were in the morgue under examination in the Department of Forensic Medicine, Dhaka Medical College, Dhaka. The samples were divided into three age-groups including Group A (10-20 years), Group B (21-50 years) & Group C (>50 years) and the weight of the thyroid glands were measured and recorded. Results: The mean weight of the thyroid gland in male was 15.14 gm, 19.20 gm and 14.64 gm and in female was 16.02 gm, 19.03 gm and 14.67 gm in group A, B and C respectively. The mean weight of the thyroid gland was 15.48 gm in group A, 19.15 gm in group B and 14.65 gm in group C. There was no difference in mean weight of the thyroid gland between male and female. The difference in mean weight of the thyroid gland between group A & group B and group B & group C were found statistically significant. The weight of the gland was found to increase from early childhood and puberty up to 50 years of age and then decrease.