scholarly journals Peculiarities of the microscopic structure of the cecum of ducks

Author(s):  
D. S. Makhotina ◽  
◽  
M. M. Kushch ◽  
O. S. Miroshnykova ◽  
◽  
...  

According to the literature review, there have been paid less attention to the peculiarities of the large intestine of domestic birds than to the small intestine. The cecum is studied mainly in terms of their microbiome and assessment of the state of the immune system through the study of the structure and cell composition of lymphoid formations. Researchers note the role of the cecum in productivity, maintaining the health and well-being of animals. The aim of the paper was to study the features of the microscopic structure of the caecum of ducks in the first year of the postnatal ontogenesis period. Determination of morphometric parameters of microstructures was performed on histological specimens from a cross section of the middle caecum of ducks 1-, 3-, 7-, 14- and 21-days old, 1-, 2- and 6-month old and 1-year-old. Active morphogenesis of intestinal microstructures was observed in 1-3-day-old ducks, as evidenced by the process of villi and crypt formation. The older ducks, their main feature of the microscopic structure of the cecum anatomy was the increase with age of their morphometric parameters, which was uneven and asynchronous. However, the density of villi and crypts did not change with the age of the bird. The indexes of adult birds morphometric parameters of the ducks cecum corresponded at different ages: the diameter of the intestine, the thickness of the serous membrane, the density of villi, the depth of the crypt – In 1 year; villi width – In 6-month; the thickness of the intestinal wall, its mucous membrane, the density of villi, their surface area, the height of the epithelium of the crypt – In 1 month; the height of the villi and their epithelium, the thickness of the muscular membrane and muscle plate - in 21 days; width and density of crypts – at 3 days sold. The most intensive increase in morphometric parameters of the caecal microstructures occurred in the first month of the postnatal period of ontogenesis, during which they changed most rapidly in the first week.


2020 ◽  
Vol 22 (100) ◽  
pp. 41-49
Author(s):  
D. S. Makhotina ◽  
M. M. Kushch ◽  
O. E. Bondarenko

As a rule, researchers pay less attention to the features of the large intestine than to the small intestine. The purpose of the study was to determine the features of the microscopic structure of the rectum of ducks during the first year of the postnatal period of ontogenesis. For histological examinations, the material was selected from Ukrainian white-breasted ducks of 9 age groups: 1-, 3-, 7-, 14-, 21-day-old, 1-, 2-, 6-month-old and 1-year-old. Morphometric parameters of microstructures were set on cross sections of the midgut. The general change pattern in the morphometric parameters of the microstructures of the rectum of ducks was their increase, which was asynchronous and uneven. There was observed an active intestinal morphogenesis continued, as evidenced by the process of formation of villi and crypts in the group of 1-3-day-old ducks. The most intensive morphometric parameters of the rectum changed in the first month of the postnatal period of ontogenesis, during which – in the first week. In the first week, first and second month of life of ducks, the wall thickness of the rectum increased by 93.1, respectively; 199.5 and 20.4 %, the thickness of the mucous membrane – 81.0; 167.1 and 19.5 %, the thickness of the muscular membrane – by 126.1; 285.3 and 22.7 %, the height of the villi – by 113.2; 208.7 and 7.2 %, the width of the villi – by 84.7; 70.9 and 12.5 %, their surface area – by 293.8; 427.6 and 20.6 %, the depth of the crypt – by 85.1; 49.9 and 52.3 %, muscle plate thickness – by 254.0; 750.8 and 15.0 %. The most stable indicators of the rectum during the first year of the postnatal period of ontogenesis were the density of villi and crypts, the number of which after 7 days of age had no significant difference compared to that of a younger age. The indicates of adult birds morphometric parameters of the rectum of ducks corresponded at different ages: in 1-year-old – the thickness of the serous membrane and the density of villi; at 6 months – the diameter of the intestine, the surface area of the villi; at 2 months of age – the thickness of the wall and its mucous membrane, the width of the villi, the depth of the crypt; at 1 month – the thickness of the muscular membrane and plate, the height of the villi, the epithelium of the villi and crypt; at 3 days of age – the density of crypts; at 1 day of age – the width of the crypt.



2020 ◽  
Vol 17 ◽  
pp. 00216
Author(s):  
Mikhail Potapov ◽  
Konstantin Nifontov ◽  
Aleksey Belogurov

A role of the blood circulatory system in a regulation of organism’s physiological functions and in a development of pathological processes is enormous. In this work the specifics of the vascular supply of the northern reindeer’s limbs are presented which are characterized by monotonous scheme. However, the northern reindeer has anatomic specific due to advanced second and the fifth dactyls. In this article there is determination of the development of forelimb’s arterial vessels of the northern reindeer during postnatal ontogenesis. In the postnatal period of development, the most intensive growth in the length and diameter of the great arteries is observed in the first year of the animal’s life, especially in the first month.





Author(s):  
Elizabeth Dettori ◽  
Geeta Rao Gupta

This chapter identifies some of the most stubborn gender-based risks and vulnerabilities girls face as a cohort from preadolescence through late adolescence across the domains of personal capabilities, security, safety, economic resources, and opportunities. It reviews progress made during the Millennium Development Goal era in improving girls’ health and well-being and looks to the role of adolescent girls in advancing the Sustainable Development Goals. The chapter concludes by recommending an approach for global partnership that is linked to national and local actions and that is centered on priority interventions that can catalyze change, at scale, for adolescent girls.



Author(s):  
Ieva Ančevska

The article examines the depiction of gratitude and related events in Latvian folklore through comparative evaluation. Gratitude is considered in a psychological context, comparing the attitude expressed in folklore with the findings of modern scientific research. Gratitude is a concept that is usually associated with a relationship or a benefit, it is most often aimed outwards, dedicated to someone else, but at the same time, it creates a pleasant feeling within the person. In modern psychology, gratitude is receiving more and more attention from researchers because its manifestations stimulate the formation of positive emotions and contribute to the improvement of the person’s overall well-being. Research and clinical studies in psychotherapy confirm that gratitude plays an important role in improving mental health and reducing depressive, destructive feelings. In turn, neuroscience research shows the potential of a grateful and positive attitude in strengthening psycho-emotional health and well-being in general. In Latvian folklore, gratitude is depicted as an important part of ritual events, which helps to ensure a positive, balanced connection with the forces of nature, gods, and society. In folklore, the importance of gratitude is emphasised more when building family relationships or accepting various situations and occurrences in life. In both psychological research and the practice of systemic therapy, as well as in folklore, gratitude appears as one of the most important values of interpersonal connection, which promotes the formation of harmonious relationships. Similar to the opinions of psychology, the folk world views emphasise the motivational role of gratitude in improving the quality of human life and health in general.





2021 ◽  
Vol 45 ◽  
pp. 1
Author(s):  
Marcelo Korc ◽  
Fred Hauchman

This paper highlights the important leadership role of the public health sector, working with other governmental sectors and nongovernmental entities, to advance environmental public health in Latin America and the Caribbean toward the achievement of 2030 Sustainable Development Goal 3: Health and Well-Being. The most pressing current and future environmental public health threats are discussed, followed by a brief review of major historical and current international and regional efforts to address these concerns. The paper concludes with a discussion of three major components of a regional environmental public health agenda that responsible parties can undertake to make significant progress toward ensuring the health and well-being of all people throughout Latin America and the Caribbean.



2022 ◽  
pp. 1715-1730
Author(s):  
Amy Tureen

Supervisors, be they employed in higher education or in other industries, operate in capacities that allow them to shape organizational cultures within their departments, divisions, colleges, or broader units. Within the higher educational model, this means that supervisors are uniquely placed to counteract negative elements within the culture of academia, which historically has tended to prioritize individual competitive output, with alternative models that may offer improvements to the emotional health and well-being of higher education employees. This chapter seeks to describe the impact of stress on the health of workers, the employment stressors that are unique to higher education, and the processes by which supervisors in higher education can use their positional power to counteract said stressors and improve academic organizational cultures. The chapter includes practical suggestions for supervisors to enhance wellness and decrease emotional harm in scenarios common to the higher education workplace as identified via social media crowdsourcing.



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