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The sweat glands of Ayrshire cattle

Published online by Cambridge University Press:  27 March 2009

J. D. Findlay  and
S. H. Yang
J. D. Findlay
Affiliation:
The Hannah Dairy Research Institute, Kirkhill, Ayr
S. H. Yang
Affiliation:
The Hannah Dairy Research Institute, Kirkhill, Ayr
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Extract

1. An investigation has been made of the structure, distribution and dimensions of the so-called sweat glands in twenty-one different body regions of each of five 3- to 4-year-old Ayrshire cows, and incidental studies have been made on calves and embryos.

2. It has been observed that in all those regions each hair follicle is accompanied by an arrector pili muscle, a sweat gland and a sebaceous gland. This combination has been designated a ‘hair follicle unit’.

3. In the skin of embryos the sweat gland appears as a single unbranched tube and in the skin of calves and cows it is a bag-shaped gland with a long slender duct which opens on the skin surface as a funnel-shaped outlet.

4. The gland is composed of two layers of cells, an outer myoepithelium and inner glandular epi thelium.

5. What may be successive stages in the intraluminal transformation of the secretory products discharged by the gland cells lining the lumen, are illustrated by a series of photographs.

6. The glands have a poor blood supply and appear to be apocrine. It is unlikely, therefore, that the sweat glands of Ayrshire cows function as effectively in heat regulation as human sweat glands.

7. The number of sweat glands per sq.cm. of skin was measured in all the regions. The average number was 1871 per sq.cm., ranging from about 1000 in the lower limbs to about 2500 in the axilla and neck regions.

8. The length and circumference of the gland were measured, hence its secretory surface was calculated. The average area of secretory surface of a single sweat gland was 0·22 sq.mm., while the average area of secretory surface of the sweat glands per sq.cm. of skin was 3·94 sq.cm. There was a significant negative correlation between the number of glands per sq.cm. and the area of secretory surface of a single sweat gland.

9. The ventral region of the neck, the axilla and upper hindleg had the largest area of secretory surface per sq.cm. of skin, while the forehead, back (sacral), gluteus, lower foreleg and hindleg had the smallest.

10. The only region which had a significantly smaller area of secreting surface than the front flank region was the sacral region of the back.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 40 , Issue 1-2 , January 1950 , pp. 126 - 133
Copyright
Copyright © Cambridge University Press 1950

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References

REFERENCES

Bonsma, J. C. (1948). Fmg S. Afr. 23, 439.Google Scholar
Brody, S. (1948). Res. Bull. Moss. Agrie. Exp. Sta. no. 423.Google Scholar
Ellenberger, W. (1906). Handbuch der vergleichenden mikroskopischen Anatomie der Haustiere, 1, 125. Berlin: Parey.Google Scholar
Findlay, J. D. (1950). Bull. Hannah Dairy Inst. no. 9.Google Scholar
Findlay, J. D., Goodall, A. M. & Yang, S. H. (1950). J. Dairy Res. (In the Press.)Google Scholar
Findlay, S. D. & Yang, S. H. (1948). Nature, Lond., 161, 1012.CrossRefGoogle Scholar
Fisher, B. A. (1946). Statistical Methods for Research Workers, 10th ed.London: Oliver and Son.Google Scholar
Freeborn, S. B., Regan, W. M. & Berry, L. J. (1934). J. Econ. Ent. 27, 382.CrossRefGoogle Scholar
Gurlt, (1835). Vergleichende Untersuchungen über die Haut des Menschen und der Haustiere, besonders in Beziehung auf die Absonderungsorgane des Hauttalges und des Schweisses. Berlin. (Cited by Speed, 1941.)Google Scholar
Kelley, R. B. (1932). Bull. Coun. Sci. Industr. Res. Austr. 27.Google Scholar
Muto, K. (1925). J. Jap. Soc. Vet. Sci. 4, 1.Google Scholar
Phillips, B. W. (1948). FAO Agricultural Studies, no. 1.Google Scholar
Began, W. M. & Richardson, G. A. (1938). J. Dairy Sci. 21, 73.Google Scholar
Rhoad, A. O. (1938). Proc. Amer. Soc. Anim. Prod. p. 284, 11.Google Scholar
Rhoad, A. O. (1940). Emp. J. exp. Agric. 8, 190.Google Scholar
Rhoad, A. O. (1944). Trop. Agriculture, Trin., 21, 162.Google Scholar
Rieck, B. F. & Lee, D. H. K. (1948). J. Dairy Res. 15, 219.CrossRefGoogle Scholar
Shiefferdecker, P. (1917). Biol. Zbl. 37, 534.Google Scholar
Speed, J. G. (1941). Vet. J. 97, 252.Google Scholar
Trautmann, A. & Fiebiger, J. (1949). Lehrbuch der Histologie und vergleichenden mikroskopischen Anatomie der Haustiere. 8th–9th ed.Berlin: Parey.Google Scholar
Yamane, J. & Ono, Y. (1936). Mem. Fac. Sci. Agrie. Taihoku, 19, 3.Google Scholar
Yang, S. H. (1948). The Histology of Cow Skin. Ph.D. Thesis. University of Edinburgh. 06.Google Scholar