Morphometric characteristics of the small and large intestines of Mus musculus during postnatal development.
نویسندگان
چکیده
The objective of this study was to investigate the size of the small and large intestine in postnatal development of Mus musculus mice. The gut was obtained from 2-, 4-, 6-, and 12-week-old animals. The morphometric analysis was performed at microscopic level. Measurements and calculations included dimensions of villi (height, diameter) and their number per 1 mm(2) surface area in the proximal, middle, and distal section of the small intestine, as well as the length and surface area (external and internal) of the small and large intestines. To find the allometric relationship between the size of the small and large intestines and body mass, reduced major axis regression was applied. The length and surface area of both intestinal segments gradually increased with age. The increase in the internal surface area of the small intestine was the result of lengthening of the intestine and increasing diameter of the villi in its proximal and middle sections. No increase in villus height during the studied period was detected. A marked increase in the size of the intestinal segments was observed between the 2(nd) and 4(th) weeks of life, when the length doubled and the surface area tripled in size. Allometric analysis revealed that the increase in length and internal surface area of the small and large intestines was more rapid than the body mass increase during the weaning period, while it was not different from isometry after the weaning. In conclusion, the greatest changes in the structure and size of the small and large intestines of mice occurred in the weaning period. During this period these two segments of intestine grew faster than the rest of the body and reached adult proportions.
منابع مشابه
Leptospirosis in small mammals of Iran: II: Isolation of Leptospira grippotyphosa, from Mus musculus
متن کامل
Somatic and germline mosaicism in interspecific chimaeras between Mus musculus and Mus caroli.
Detailed analysis of mosaicism in interspecific chimaeras between Mus musculus and Mus caroli revealed that cells of the two species could coexist and interact normally in all tissues studied. No selection occurred against M. caroli cells during gestation of chimaeras in the M. musculus uterus, but some tissue-specific differential growth of M. musculus and M. caroli cells occurred during postn...
متن کاملPrevalence of Leishmaniasis in Rodent's Fauna in Turkmen Sahra, Iran
Abstract Background and Objective: Given the Leishmaniasis is endemic in Turkmen Sahra, we aimed to study the contamination of rodents with this disease. Material and Methods: Seventy-three rodents were collected from three regions (Gonbad, Gomishan and Bandar Turkmen) using live traps. In laboratory, morphometric characteristics were measured and for diagnosis of Leishmaniasis CL, the ...
متن کاملAlteration in postnatal development of masseter innervation in hypothyroid rats
The thyroid hormones have profound effects on the development of neuromuscular system. These hormones exert their influence on both muscle fibers and related motoneurons during development. Masseter is one of the most important muscles for mastication in mammals. Thyroid hormone deficiency 3 weeks after birth, the period in which an alteration from sucking to biting occurs, could influence the ...
متن کاملAlteration in postnatal development of masseter innervation in hypothyroid rats
The thyroid hormones have profound effects on the development of neuromuscular system. These hormones exert their influence on both muscle fibers and related motoneurons during development. Masseter is one of the most important muscles for mastication in mammals. Thyroid hormone deficiency 3 weeks after birth, the period in which an alteration from sucking to biting occurs, could influence the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Folia morphologica
دوره 70 4 شماره
صفحات -
تاریخ انتشار 2011