Sweat Gland Function in the Ayrshire Calf

The role of the sympatho‐adrenal system in the control of sweating in the ox (Bos taurus).

“…The sudomotor effect of intradermal or intravenous adrenaline administration observed here confirms the findings of previous workers (Ferguson & Dowling, 1955;Taneja, 1959;Findlay & Jenkinson, 1964). The glands also respond to noradrenaline and isoprenaline.…”

“…It might be expected, therefore, that if the increases in cutaneous moisture loss were due to sebaceous gland activity then the moisture appearing on the surface would be rich in lipid material. Findlay & Jenkinson (1964) were unable to detect any lipid material in droplets of moisture appearing on the skin after intravenous adrenaline administration. McDowell, McDaniel, Barrada & Lee (1961) have shown that inactivation of bovine sweat glands by formaldehyde iontophoresis considerably reduces cutaneous moisture loss.…”

The Sweat Glands and Hair Follicles of Asian, African, and South American Cattle

“…Sweat gland volume in American cattle tended to be intermediate between the low values found for Asian and African cattle and the relatively high values of European cattle. Sweat gland volume in cattle is known to decrease in summer and after heat exposure (Hayman and Nay 1958;Findlay and Jenkinson 1964). The smaller sweat glands of tropical cattle may, therefore, be indicative of greater activity, and consequently lower sweat gland volumes may be expected in cattle which live in conditions of greater heat stress; sweat gland shape does not appear to reflect glandular activity since similar ranges of shape are found in different continents (Fig.…”

Comparative Physiology of Sweating

“…necrobiotic discharge. Physiological studies on the calf (Findlay & Jenkinson, 1964) have shown that such a secretory process does not occur in that species. The sweat glands of cattle and the sheep and goat do not function in the classical apocrine manner and it is doubtful if such a process of secretion exists in sweat glands (Jenkinson, 1967).…”

“…The glands in specialized body regions generally appear to be longer and more convoluted than those of the body surface. The fundus of all species studied consists of two layers of epithelium, (i) an inner secretory epithelium, the cells of which are flat in some species (Findlay & Jenkinson, 1964) and columnar in others, e.g. the human axilla, and (2) an outer myoepithelitim composed of canoe-shaped cells (Tucker, 1968;Jenkinson, 1971 43.…”