Histological Structure and Functions of Synovium1

The Possibility of Using Honey as Cytoprotective Against Pathological Effect of Doxorubicin Morphological Changes, Toxilogical Symptoms, Histological Structure and Functions of Mice Liver

Journal of King Abdulaziz University-Science ◽

10.4197/sci.21-2.16 ◽

2009 ◽

Vol 21 (2) ◽

pp. 395-418

Author(s):

M. Ganash ◽

M. Mujallid ◽

A. Al-Robai

Keyword(s):

Morphological Changes ◽

Histological Structure ◽

Pathological Effect ◽

Mice Liver ◽

Structure And Functions

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Structure and functions of the types of Norway spruce (Picea abies[L.] Karst.) roots

Journal of Forest Science ◽

10.17221/4566-jfs ◽

2012 ◽

Vol 51 (No. 7) ◽

pp. 305-311 ◽

Cited By ~ 2

Author(s):

R. Gebauer ◽

M. Martinková

Keyword(s):

Picea Abies ◽

Norway Spruce ◽

Fine Roots ◽

Mechanical Load ◽

Mutual Position ◽

Histological Structure ◽

Tree Roots ◽

Herb Species ◽

Structure And Functions ◽

Forest District

The aim of the study was to describe variability of the structure of roots in Norway spruce (Picea abies [L.] Karst.) from their growth tips to the stem foot, i.e. anchor roots in relation to their changing functions. Histology and anatomy of plant organs were dealt with by the innumerable number of authors and fundamentals of knowledge in these disciplines have become the self-evident part of botany textbooks. The description of primary and secondary structure of roots is explained in many textbooks by means of drawings depicting the mutual position of particular systems of tissues. However, it refers mostly to the structure of herb roots in either Magnoliophytes or Liliophytes. Naturally, the structure of tree roots does not substantially differ from herb species. A certain problem is related to the secondary thickening of roots, their ramification, anastomosis and changes in the structure which are enforced by tension and pressure forces; these forces affect the roots during their mechanical load, e.g. by solifluction, soil load and compaction or through their above-ground systems. Trees can be stressed by wind gusts, snow cover, glazed frost and a number of other factors. Therefore, the structure of roots changes in the course of time as well as due to the increasing weight of the stem and crown. In terms of histological structure Norway spruce roots were studied within a forest stand in the area of the Křtiny Training Forest Enterprise, viz. Vranov Forest District (49°19´484´´N, 16°47´629´´E). Root systems were exposed with an air blast using the AIR-SPADE tool (nadezhdina, čermák 2003) and cuts of buttress roots, horizontal roots, root anastomosis and fine roots were selected. Histological studies were focused on manual transversal cuts of fine roots.

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Morphological changes of the liver under conditions of hyperhomocysteinemia in the background of hypo- and hyperthyroidism

Reports of Morphology ◽

10.31393/morphology-journal-2020-26(2)-03 ◽

2020 ◽

Vol 26 (2) ◽

pp. 19-25

Author(s):

V.M. Nechyporuk ◽

M.M. Korda ◽

O.V. Kovalchuk

Keyword(s):

Thyroid Dysfunction ◽

Negative Impact ◽

Morphological Changes ◽

Normal Growth ◽

Daily Administration ◽

Histological Structure ◽

Organ Function ◽

Inflammatory Processes ◽

Oxidative Processes ◽

Structure And Functions

Thyroxine and Triiodothyronine are very important for normal growth, development and organ function. These hormones regulate the basal rate of metabolism of all cells, including hepatocytes, and thus modulate liver function. There is a close connection between hyperhomocysteinemia (HHCy) and the induction of oxidative processes, disruption of nitric oxide production of NO synthase, damage to the endoplasmic reticulum and activation of inflammatory processes in the liver. Disorders of homocysteine metabolism (HC) in thyroid dysfunction are also known. Therefore, it can be assumed that the violation of the structure and functions of the liver will be an important manifestation of the negative impact of HHCy on organs and tissues in hyper- and hypothyroidism. The aim of the study was to establish the reorganization of the structural components of the liver in the conditions of modelized HHCy, hyper- and hypothyroidism and their joint effects. Thiolactone HHCy was modelized by administering to animals an exogenous HC in the form of Thiolactone at a dose of 100 mg/kg body weight once a day for 28 days. Hyperthyroidism was modelized by daily administration of L-thyroxine at a dose of 200 μg/kg for the 21 days, hypothyroidism - daily administration of Thiamazole at a dose of 10 mg/kg for the 21 days. Individual groups of animals were administered L-thyroxine and Thiamazole in parallel with HC. It was found that in the conditions of simulated HHCy, hypo- and hyperthyroidism in the liver of experimental animals there is an incompleteness of hepatocyte beams, changes in hepatocytes of destructive, dystrophic and necrotic nature with signs of steatosis, vascular disorders. Conclusions: both HHCy and hypo- or hyperthyroidism lead to a violation of the structural organization of liver tissue. With the development of thyroid dysfunction on the background of HHCy, the disturbances of the histological structure of hepatocytes significantly increased.

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