Selecting Merino rams for ability to withstand infertility caused by heat. 1. Anatomy and functional activity of the scrotum

1971 ◽  
Vol 11 (49) ◽  
pp. 137 ◽  
Author(s):  
DG Fowler ◽  
GMH Waites
Keyword(s):  
Surface Area ◽  
Heat Tolerance ◽  
Functional Activity ◽  
Sweat Gland ◽  
Sweat Glands ◽  
Fluid Loss ◽  
Fibre Density ◽  
Scrotal Heating

Merino rams selected for (Folds Plus) and against (Folds Minus) skin wrinkle have been used in a study of scrotal heat tolerance. The type selected against skin wrinkle (Folds Minus) showed a higher scrotal fluid loss and sweat gland and fibre density than the Folds Plus type. Folds Minus rams had smaller scrotal sweat glands which discharged more frequently than those of the Folds Plus rams during early periods of scrotal heating. Scrotal heat tolerance was seen to increase with increases in scrotal surface area. These findings are discussed in terms of the light they shed on the problem of identifying the features that characterize high scrotal heat tolerance in Merino rams

407. The number of sweat glands in the helix of the cow's ear and the milk yield

1950 ◽  
Vol 17 (1) ◽  
pp. 22-36 ◽  
Author(s):  
J. D. Findlay ◽  
A. Myfanwy Goodall ◽  
S. H. Yang
Keyword(s):  
Surface Area ◽  
Milk Yield ◽  
Sweat Gland ◽  
Unit Area ◽  
Sweat Glands ◽  
Young Calf

1. A study has been made of the distribution of the so-called sweat glands in the ears of Ayrshire cattle.2. The number of sweat glands per unit area of skin in the ear was found to vary greatly from one part of the ear to another and did not appear to be related to the milk yield. It is concluded that it is impossible to use the sweat-gland count in the ear as an indication of the milk-producing capacity of Ayrshire cattle.3. The number of sweat glands per unit area in the ear of the very young calf was found to be greater than in the fully grown cow, the number being roughly inversely proportional to the surface area of the ear.4. These findings for Ayrshire cattle are contrary to those published by a number of other workers for cattle of the Red German breed, who claim that any portion of the ear can be used to obtain a sweat-gland count which is closely correlated with milk yield.

Functional and morphological changes in the eccrine sweat gland with heat acclimation

1990 ◽  
Vol 69 (1) ◽  
pp. 232-236 ◽  
Author(s):  
F. Sato ◽  
M. Owen ◽  
R. Matthes ◽  
K. Sato ◽  
C. V. Gisolfi
Keyword(s):  
Relative Humidity ◽  
Heat Tolerance ◽  
Sweat Gland ◽  
Unit Length ◽  
Heat Acclimation ◽  
Tolerance Test ◽  
Sweat Glands ◽  
Before And After ◽  
Secretory Coil

Three adult male patas monkeys (11-15 kg) were heat acclimated by continuous exposure to an ambient temperature of 33 +/- 1 degree C at 13% relative humidity for 9 mo. During the last month, they were also exposed to 45 degrees C at 10% relative humidity for 4 h/day and 5 days/wk. Before and after 3 wk of acclimation, the animals were given a heat-tolerance test in which rectal (Tre) and mean skin (Tsk) temperatures, heart rate, and sweat rate (msw) were monitored during a 90-min exposure to 45 degrees C heat with 24% relative humidity under lenperone (1.0-1.4 mg/kg im) tranquilization. Maximal in vivo msw was also determined in response to subcutaneous injections (1 and 10% solutions) of methacholine (MCh). Before and after 9 wk and 9 mo of acclimation, sweat glands were dissected from biopsy specimens of the lateral calf, cannulated, and stimulated in vitro with MCh. Morphological measurements of isolated tubules were compared with maximal secretory rates produced by MCh stimulation. Three weeks of acclimation 1) reduced Tre and Tsk and increased msw during the heat tolerance test and 2) significantly increased maximal msw in response to MCh stimulation. Acclimation also increased (P less than 0.05) sweat gland size, as measured by tubular length and tubular volume. Maximal in vitro msw produced by MCh stimulation and msw per unit length of secretory coil also increased significantly. We conclude that heat acclimation increases the size of eccrine sweat glands and that these larger glands produce more sweat. They are also more efficient because they produce more sweat per unit length of secretory coil.

Functional Activity of the Sweat Glands in the Hairy Skin of the Dog

Science ◽  
1951 ◽  
Vol 114 (2953) ◽  
pp. 123-124 ◽  
Author(s):  
T. Aoki ◽  
M. Wada
Keyword(s):  
Functional Activity ◽  
Sweat Glands ◽  
Hairy Skin

scholarly journals The Sweat Glands and Hair Follicles of European Cattle

1972 ◽  
Vol 25 (3) ◽  
pp. 585 ◽  
Author(s):  
D Mcewan Jenkinson ◽  
T Nay
Keyword(s):  
Hair Follicle ◽  
Sweat Gland ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Mean Values ◽  
The Mean ◽  
European Cattle

Measurements were made on the skins of 1363 cattle from different European breeds. The mean values of these measurements have been tabulated for each breed and the skin types present in each breed or group of breeds have been determined using sweat gland shape (LID) and hair follicle depth (FrY) as the principal bases of comparison.

scholarly journals RECURRENT MALIGNANT APOCRINE SWEAT GLAND CARCINOMA - A CASE REPORT

2021 ◽  
pp. 1-2
Author(s):  
AKHILA JANGA ◽  
MOHAMMED ZIAUDDIN ◽  
RAVI CHANDER PATLOLLA
Keyword(s):  
Local Excision ◽  
Wide Local Excision ◽  
Sweat Gland ◽  
Early Stage ◽  
Case Reports ◽  
Case Series ◽  
Biological Behavior ◽  
Sweat Glands ◽  
Second Phase ◽  
Apocrine Carcinoma

Apocrine carcinomas arise from normal or modified sweat glands. The slow-growing nature and rarity of sweat gland carcinomas complicate their diagnosis at the early stage. The incidence of PASGC is quite low at 0.0049–0.0173 cases/100,000 persons/year. A 21-year-old male patient was presented in February 2016 with small solitary mass in the right axilla with mild tenderness and pain. Underwent wide local excision and axillary dissection at our institution followed by adjuvant radio and chemotherapy. Later on, after 18 months developed local recurrence and was planned for re-surgery and a second phase of palliative radiotherapy. After a year, presented to the hospital with pin sized irregular swelling in the axilla. Sweat gland carcinomas which are rarely diagnosed create a pathological dilemma due to their unpredicted biological behavior. However, wide local excision with or without nodal dissection is the primary treatment till date. In this particular case even though patient had underwent axillary node dissection, patient had recurrence twice with no distant metastasis which is a key point to be noted. Thorough study of the available apocrine carcinoma case reports or case series, the better knowledge regarding the apocrine carcinoma can be obtained.

Effect of physical training on peripheral sweat production

1988 ◽  
Vol 65 (2) ◽  
pp. 811-814 ◽  
Author(s):  
M. J. Buono ◽  
N. T. Sjoholm
Keyword(s):  
Physical Training ◽  
Sweat Gland ◽  
Sweat Rate ◽  
Secretory Activity ◽  
Sweat Glands ◽  
Trained Subjects ◽  
Peripheral Mechanism ◽  
Sweat Production ◽  
Sedentary Women

The purpose of this study was to determine the in vivo secretory activity of sweat glands from sedentary and trained subjects. Peripheral sweat production was determined using pilocarpine iontophoresis in 40 volunteers (10 sedentary men, 10 endurance-trained men, 10 sedentary women, 10 endurance-trained women). Peripheral sweat rate was significantly (P less than 0.05) greater in trained men [6.9 +/- 0.6 (SE) g.m2.min-1] and women (6.1 +/- 0.7) compared with sedentary men (3.1 +/- 0.5) and women (2.5 +/- 0.4). Furthermore, peripheral sweat rate was significantly correlated (r = 0.73) with maximal O2 uptake. The above two findings would suggest that physical training improves the secretory activity of the human sweat gland. Such a result supports previous findings that have suggested that the potentiation in sweating seen after training is achieved via a peripheral mechanism. In addition, several gender-related differences were found in the sudorific response of men and women. Specifically, women have a significantly greater sweat gland density, whereas men have a greater sweat production per gland.

Sweating rate at different body regions in cattle and its correlation with some quantitative components of sweat gland volume for a given area of skin

1969 ◽  
Vol 20 (2) ◽  
pp. 395 ◽  
Author(s):  
YS Pan ◽  
SM Donegan ◽  
RH Hayman
Keyword(s):  
Population Density ◽  
Negative Correlation ◽  
Sweat Gland ◽  
Statistical Significance ◽  
Sweat Glands ◽  
Body Region ◽  
Sweating Rate ◽  
Positive Correlation ◽  
Gland Volume ◽  
Body Regions

Sweating rates at five body regions on four Jersey and four Sahiwal x Jersey crossbred heifers were measured in a hot room under three treatments differing in temperature and duration. The correlations between sweating rate and some quantitative components of sweat gland volume for a given area of skin were examined. Differences in sweating rate between body regions, interactions between breed and body region in sweating rate, and differences in sweating rate for the various treatments were all shown to be statistically significant. There was no significant interaction between body regions and treatment in sweating rate.Between body regions within an animal, there was a positive correlation between sweat gland population density and sweating rate and a negative correlation between mean sweat gland volume and sweating rate. This negative correlation was associated with the fact that regions with high sweat gland population density also tended to have smaller sweat glands and vice versa. Indications of a positive correlation between the total sweat gland volume per unit area and sweating rate were also found, though none of these approached statistical significance.

Electric response in the mammary gland

1960 ◽  
Vol 15 (3) ◽  
pp. 511-514 ◽  
Author(s):  
Alexander Forbes ◽  
Marjorie Neyland ◽  
Sally Fox
Keyword(s):  
Mammary Gland ◽  
Sweat Gland ◽  
Myoepithelial Cells ◽  
Emotional Reaction ◽  
Emotional Reactions ◽  
Sweat Glands ◽  
Electric Response ◽  
Slow Response ◽  
Indirect Control ◽  
Palm Of The Hand

Our previous investigations have indicated that ‘let-down’ sensation in the mammary gland in nursing, or on injection of Pituitrin, is accompanied by slow electric response. This was believed to emanate from secreting-gland cells or from contractile myoepithelial cells. Indirect control indicated that sweat-gland activity, related to emotional reaction, played little part in electric response recorded from the breast. We have controlled this question of sweat-gland participation in observed response by recording simultaneously from the palm of the hand and from the areola in a non-lactating subject. It was found that spoken words evoking emotional reactions were accompanied by large electric responses from the palm, but from the areola there were either no responses or very small inverse deflections, presumably due to sweat glands in the skin of the thorax. Observations on lactating subjects showed that during nursing occasional deflections in the palmar record resembled those evoked in word tests, but in no case did the palmar record show a slow response synchronized with that recorded from the areola during the letdown. From these observations we conclude that sweat-gland reactions play little part in the characteristic let-down electric response led off from the areola. This must arise from a different source, presumably either the myoepithelial cells, the secreting cells, or both. Submitted on January 14, 1960

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