Slide DMS194 [Skin (axillary), vert. sec., PTS]. This is another section of hairy thin skin, but with a new feature, apocrine glands, another variety of sudoriferous (sweat) gland found mainly in the axillary and perineal regions. Unlike eccrine sweat glands, these usually drain into hair follicles, like sebaceous glands. Little is known about their viscous secretion, but it is likely of a sexual nature. The glands only begin to function after puberty. Excellent cytological detail is afforded by this plastic thick section. Note the considerably larger size of the secretory units of the apocrine compared to those of eccrine sweat glands. The brightly eosinophilic myoepithelial cells subjacent to the lining epithelial cells of the secretory units are easily seen. Function of these cells?