scholarly journals Morphological characteristics of the skin and hair of clinically healthy dogs and cats

2020 ◽  
pp. 80-84
Author(s):  
O. S. Snopenko ◽  
◽  
O. P. Timoshenko ◽  
A. Y. Ulyanitskaya ◽  
D. V. Kibkalo ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Morphological Characteristics ◽  
Punch Biopsy ◽  
Hair Follicles ◽  
Domestic Cat ◽  
Domestic Dogs ◽  
Skin Thickness ◽  
Sebaceous Glands ◽  
Histological Characteristics ◽  
Healthy Dogs

The article describes the histological characteristics of the skin of clinically healthy domestic dogs and cats, presents morphometric data on the thickness of the skin, layers of the epidermis, the area of the sebaceous glands and hair follicles; describes sexual and seasonal skin replacements in domestic dogs and cats, common in the east of Ukraine. The material for research is the skin of clinically healthy dogs and cats. Research method is histological. Punch-biopsy of skin fragments was performed in animals on the right from the middle of the lateral surface of the back. Fragments of skin after fixation in 10 % neutral formalin were examined by paraffin, followed by staining of slides with hematoxylin-eosin and by gelatin impregnation, staining with Sudan II, hematoxylin of Karachi. In horizontal and vertical skin sections, the following was investigated: the thickness of the epidermis, papillary and reticular layers, the length and width of the sweat and sebaceous glands, follicle of the hair, the location of hair bundles and the ratio of secondary follicles to primary ones. The histological characteristics of skin and derivatives in dogs and cats have been established. The information obtained from morphometric histostudies indicates significant fluctuations in the values in cats depending on the season; the difference in skin thickness in winter and summer reached 1407 μM and had the same parameters in females and males. The papillary and reticular layers of the dermis correlated with the total skin thickness as 53.9 and 60.3 % in winter and 45.4 and 38.7% in summer, respectively. Epidermal seasonal changes were less significant. The papillary layer of the skin of the domestic cat was more developed than the reticular layer, in contrast to the dogs. The area of the basal sebaceous glands in cats averaged 0.05 mm2 in summer and 0.013 mm2 in winter. In domestic dogs, skin thickness and hair density did not depend on seasonal changes, but on the sex of the animals; in females, the skin was on average 496 + 183 microns thick, and the density was not significantly higher than in males. The area of the sebaceous glands averaged 0,020 mm2 in dog, in cats 0.013 mm2 in summer and in winter – 0.05 mm2.

scholarly journals A Morphological and Histological Investigation of the Sinus Interdigitalis in Konya Merino Sheep

2021 ◽  
Vol 9 (8) ◽  
pp. 1509-1513
Author(s):  
Zekeriya Özüdoğru ◽  
Ramazan İlgün ◽  
Derviş Özdemir
Keyword(s):  
Hair Follicles ◽  
The Body ◽  
Sweat Glands ◽  
Histological Investigation ◽  
Sebaceous Glands ◽  
Morphometric Measurements ◽  
Merino Sheep ◽  
Inner Surface ◽  
Histological Characteristics ◽  
Neck Part

In the study, it was aimed to reveal the morphological, morphometric and histological characteristics of sinus interdigitalis found in the fore and hind feet of Konya merino sheep. For this purpose, the fore and hind feet of 10 Konya merino sheep, weighing between 44-79 kg, were used. Sinus interdigitalis were dissected out from the feet, and after morphometric measurements were made, morphological examinations were performed and photographed. The shape of the sinus interdigitalis, present in all the forefeet and hind feet, resembled a pipe consisting of neck and body. It was determined that the neck part was longer than the body at all feet. The inner surface of the gland was covered with hair, and there was more hair on the neck than on the body. The weight of the gland, body length and diameter, flexura, canal length and diameter were measured morphometrically. In the measurements made, it was determined that all the values of the forefeet were higher than the hind feet. In histological examination, it was found that the wall of the sinus interdigitalis consists of three layers: epidermis, dermis and fibrous capsule, and in the dermis, hair follicles, sebaceous glands, m. arrector pili and sweat glands were found.

Age-related changes in the skin structure and wool quality in sheep of Artlukh merino breed

2021 ◽  
pp. 47-54
Author(s):  
I. I. Dmitrik ◽  
G. V. Zavgorodnyaya ◽  
M. I. Pavlova
Keyword(s):  
Hair Follicles ◽  
Sweat Glands ◽  
Skin Thickness ◽  
Sebaceous Glands ◽  
Wool Fibers ◽  
Age Related ◽  
The Republic ◽  
One Year ◽  
Objective Indicators ◽  
Selection Of

Increasing the production of wool and improving its quality characteristics for a number of years remains an urgent issue in breeding work with fine-fleeced sheep. In this regard the main purpose of the research was a comparative assessment of the age dynamics of the main properties of wool and the histostructure of the skin of the young ewes of Artlukh merino breed in the farm AC “Krasny Oktyabr” in the Kazbekov district in the Republic of Dagestan. It has been found that at the age of one year in the experemental young ewes the epidermis increased by 21,2 %, the pilar and reticular layers by 2,9 and 12,8 %, respectively, and the total skin thickness by 6,1 %. The biggest increase in skin thickness was due to the epidermis and the reticular layer as the number of fat cells increased. The width of the secretory parts of the sweat glands increased by 7,1 %, the sebaceous glands by 9,6 %, in this regard the amount of wool fat increased by 7,6 %. The studied parameters of the skin histostructure revealed that the number of hair follicles decreased by 6,8 % with age. This is due to the increase in the area of the skin due to the growth of the animal. The change in the basic properties of wool was as follows: the diameter of wool fibers increased by 5,6 %, the strength of wool decreased by 13,8 %. Comprehensive studies allowed us to recommend testing the main properties of wool and indicators of the histostructure of the skin of experimental animals when improving existing breeds and breeding new breeds and lines of sheep. Histological studies of the skin should be carried out at the age of 4,5 months, and the most objective indicators are the ratio of secondary and primary follicles, this will allow for early selection of lambs by wool density.

scholarly journals Morphological characteristics of interdigital diverticulum (sinus cutaneous interdigitalis) of Dubska Pramenka

2013 ◽  
Vol 29 (3) ◽  
pp. 441-448 ◽  
Author(s):  
R. Avdic ◽  
A. Katica ◽  
N. Mlaco ◽  
A. Softic ◽  
F. Tandir ◽  
...  
Keyword(s):  
Morphological Characteristics ◽  
Hair Follicles ◽  
Domestic Sheep ◽  
Histological Structure ◽  
Anatomical Location ◽  
Pathological State ◽  
Sebaceous Glands ◽  
Anaerobic Microorganisms ◽  
Growth And Reproduction ◽  
The Ideal

Lameness in sheep, especially in semi-extensive breeding of Dubska pramenka, which starts in the interdigital region, was the motive of our morphological and histological research, in order to and in some way, bring the structure of the interdigital sinus in correlation with the appearance of this pathological state that causes extensive economical losses in the domestic sheep breeding,. The anatomical location of the interdigital diverticulum, its histological structure, which point to abundance of sebaceous glands around the hair follicles surrounding the interdigital opening and interdigital glands in deeper layers, point to the suggestion that their secretion increases due to poor hygienic keeping conditions. Pathogens - anaerobic microorganisms, which are most commonly causing the contagious lameness find the ideal conditions for their growth and reproduction because the secretion of these glands is likely "to close" the only "air" communication - interdigital opening.

Adaptive changes of the hair coat of the horses of zabaykalsky aborigenous breed

2019 ◽  
Vol 49 (4) ◽  
pp. 101-105 ◽  
Author(s):  
G. M. Shkyratova ◽  
B. Z. Bazaron ◽  
T. N. Khamiruev ◽  
S. M. Dashinimaev
Keyword(s):  
Seasonal Changes ◽  
Climatic Conditions ◽  
Skin Thickness ◽  
Summer Period ◽  
Hair Coat ◽  
Skin Fold ◽  
Winter Grazing ◽  
Shoulder Blade ◽  
Quantitative Indicators

The seasonal changes in the skin thickness and structure of the horses’ coat, as signs of adaptation to environmental factors, were studied. The experiment was carried out with the livestock kept in a herd using winter-grazing technology without additional feedings in the climatic conditions of the Trans-Baikal Territory. The objects of the research were adult mares of Zabaikalsky breed of horses of the same age, class and fatness. The studies were carried out in the middle of each season (May, July, October, February). The length of the coat was measured with a caliper, the coat itself with the determination of the ratio of hair (fl uffy hair, heterotype hair and coarse hair) and the thickness of the skin fold were measured in accordance with the approved methodological recommendations. The minimum skin thickness in winter was detected in mares on the back and shoulder blade – 4.3 and 4.4 mm, the maximum – on the side and thigh – 4.5 4.6 mm. When compared with the summer period, the increase on the side was 0.8 mm, whereas on the back, shoulder blade and thigh – 0.4 mm (p ≤ 0,001). In spring, thickening of the skin was noted within 0.1-0.3 mm in the same topographic areas, compared to autumn. The quantitative indicators of the coat changed depending on the season of the year. In winter, the coat contained more fl uffy hair (23.10%), and less coarse hair (68.24%), in summer there was a lower content of fl uffy hair (4.33%), but more coarse hair (94.01%.) Sharp seasonal changes were noted with regard to the length of the hair. The longest hair was found in winter and spring – 4.96 and 4.26 cm, whereas the shortest – in summer and autumn – 0.94 and 1.90 cm, respectively.

scholarly journals MORPHOLOGICAL CHARACTERISTICS OF POSTTRAUMATIC SKELETAL MUSCLE REGENERATION AFTER EXPERIMENTAL BLAST INJURY

2015 ◽  
Vol 14 (4) ◽  
pp. 17-24 ◽  
Author(s):  
N. G. Vengerovich ◽  
I. A. Shperling ◽  
Yu. V. Yurkevich ◽  
O. O. Vladimirova ◽  
I. I. Alekseyeva ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Muscle Regeneration ◽  
Morphological Analysis ◽  
Morphological Characteristics ◽  
Blast Injury ◽  
Regenerative Process ◽  
Lower Limbs ◽  
Skeletal Muscle Regeneration ◽  
Musculoskeletal Tissue ◽  
Histological Characteristics

The research objective was a morphological analysis of posttraumatic regeneration of musculoskeletal tissue in rats after experimental blast injury with field simulation of remote musculocutaneous injury of lower limbs. Wound process was evaluated visually and by histological characteristics of injury zones. This research helped to deepen understanding of details of regenerative process of blast musculocutaneous injury and formation of regenerating muscular and connective tissue of skeletal muscle in rats

78 Radio electric asymmetric conveyer treatment during prolonged cold storage of ovaries enhances developmental competence of oocytes in the domestic cat model

2020 ◽  
Vol 32 (2) ◽  
pp. 165
Author(s):  
F. Ariu ◽  
E. Sanna Passino ◽  
A. Piras ◽  
V. Melosu ◽  
M. Maioli ◽  
...  
Keyword(s):  
Fertility Preservation ◽  
Cold Storage ◽  
Ovarian Tissue ◽  
Morphological Characteristics ◽  
Domestic Cat ◽  
Developmental Competence ◽  
Cleavage Rate ◽  
Long Distance ◽  
Functional Changes ◽  
Phosphate Buffered Saline

Hypothermic storage (4°C) of ovaries for long-distance transport holds great potential to expand access to fertility preservation in animals and humans (Duncan et al. 2016 Reproduction 152, 201-210). However, storage for prolonged periods (over 24h) leads to structural/functional changes in the ovarian tissue with a critical reduction of follicular viability and oocyte quality (Piras et al. 2018 Reprod. Biol. Endocrinol. 10, 16-76; Isachenko et al. 2009 Fertil. Steril. 91, 1556-1559). The radio electric asymmetric conveyer (REAC) is a novel technology platform for neuro and bio-modulation that optimize the ion fluxes and the mechanisms driving cellular asymmetry and polarization in biological structures (Maioli et al. 2016 Sci. Rep. 6, 28682). The REAC has already proved to be effective in promoting cell differentiation and reprogramming and to counteract the biological mechanisms linked to aging and the degenerative process (Berlinguer et al. 2017 Reprod. Biol. Endocrinol. 15, 11; Maioli et al. 2014 Age 36, 9-20). In the present study, the domestic cat was used as an experimental model to evaluate the effect of REAC treatment during ovary storage at 4°C for 48h on invitro developmental ability of oocytes retrieved from antral follicles. Ovaries harvested from healthy domestic queens during ovariectomy were randomly assigned to the REAC-treated (R: n=13) and untreated (C: n=13) groups. In detail, ovaries were maintained in 4mL of phosphate-buffered saline at 4°C for 48h. The REAC device was set at 2.4 GHz, and its conveyer electrodes were immersed into the phosphate-buffered saline. After 48h, ovaries were sliced to release cumulus-oocyte complexes, which were selected according to their morphological characteristics (Johnston et al. 1991 Biol. Reprod. 45, 898-906) for IVM (R: n=130; C: n=133). Matured oocytes were fertilised (IVF) with frozen-thawed epididymal spermatozoa and presumptive zygote were invitro cultured (IVC) for 7 days. On Day 2 and Day 7 of IVC, respectively, the number of embryos cleaved and developing to the blastocyst stage was determined. The IVM, IVF, and IVC were performed according to the procedure of Piras et al. (2018 Reprod. Biol. End. 16, 76). Data were analysed by chi-square test with STATA\IC 11.0. Maturation rate of oocytes did not differ between groups (R: n=59/130, 45.4%; C: n=66/133, 49.6%). Cleavage rate was higher (P<0.05) in the R group (n=34/59, 57.6%) compared with the C group (n=25/66, 37.9%). The percentages of blastocyst formation relative to the number of cleaved embryos (R: n=12/34, 35.3%; C: n=3/25 12.0%) and to the total number of MII oocytes (R: n=12/59, 20.4%; C: n=3/66, 4.5%) increased (P<0.05) after REAC treatment compared with the untreated counterpart. In conclusion, REAC treatment during cold storage of cat ovaries for 48h positively affected the quality of oocytes as assessed by invitro embryo production outcome. The REAC technology could provide a useful approach for the optimization of ovarian tissue transport conditions for fertility preservation especially for endangered species and patients with fertility-threatening conditions.

scholarly journals Structural changes in hair follicles and sebaceous glands of hairless mice following exposure to sulfur mustard

2014 ◽  
Vol 96 (3) ◽  
pp. 316-327 ◽  
Author(s):  
Laurie B. Joseph ◽  
Diane E. Heck ◽  
Jessica A. Cervelli ◽  
Gabriella M. Composto ◽  
Michael C. Babin ◽  
...  
Keyword(s):  
Structural Changes ◽  
Sulfur Mustard ◽  
Hair Follicles ◽  
Sebaceous Glands ◽  
Hairless Mice

scholarly journals Hair Follicle Nevus with Sebaceous Hyperplasia: A Dermoscopic Observation

2015 ◽  
Vol 7 (3) ◽  
pp. 358-362 ◽  
Author(s):  
Kazutoshi Harada ◽  
Yuichiro Kato ◽  
Yukihiko Kato ◽  
Ryoji Tsuboi
Keyword(s):  
Hair Follicle ◽  
Hair Follicles ◽  
Pathological Findings ◽  
Sebaceous Glands ◽  
The Face ◽  
Diagnostic Usefulness ◽  
Well Differentiated ◽  
Histopathological Investigation

We herein report a case of hair follicle nevus, a rare hamartoma found on the face and showing follicular differentiation, which was associated with sebaceous hyperplasia. Dermoscopy of the lesion showed yellow globules surrounded by crown vessels/telangiectasias and scattered tiny hairs. Histopathological investigation revealed hyperplasia of the sebaceous glands and proliferation of well-differentiated vellus hair follicles. These pathological findings were thought to correspond to the yellowish globules and tiny hairs observed under dermoscopy. Hair follicle nevus associated with sebaceous hyperplasia is extremely rare; however, dermoscopic examination can suggest an appropriate diagnosis. The present case proved the diagnostic usefulness of dermoscopy for cutaneous tumors with hair follicular and sebaceous glandular differentiation.

HOW WIGS AND WOMEN’S BEAUTY SUPPLY PRODUCTS MOVE THROUGHOUT THE SUPPLY CHAIN

2018 ◽  
Vol 3 (10) ◽  
Author(s):  
Alexa Green ◽  
Felicia Jefferson
Keyword(s):  
Supply Chain ◽  
Epithelial Cells ◽  
Literature Review ◽  
Hair Loss ◽  
Outer Layer ◽  
Hair Growth ◽  
Review Paper ◽  
Hair Follicles ◽  
Key Factors ◽  
Sebaceous Glands

Everyone wants shine, softness, and hair strength, all key factors in having healthy hair. The purpose of this literature review is to provide information about healthy hair growth. Research states that the hair grows from follicles within the skin. Hair follicles are sacs where hair grows and where the sebaceous glands open. The follicles lined by cells derived from the epidermal. Keratin protects epithelial cells from damage and it makes up the outer layer of human skin. Even though there are many ways you can grow your hair, there are many ways you can lose your hair as well. This review paper also explains disorders that can cause hair loss.

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