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- MATCHING TYPE COLOUMN A COLOUMN B Simple, coiled tubular glands They mainly serve a thermoregulatory role and maintain body temperature by evaporative heat loss Their yellow, viscous, oily secretion has an acrid or musky odor It includes ceruminous glands in the skin Known as odoriferous sweat glands They develop in the embryo as invaginations of epidermis Start to function at puberty and are controlled by sex hormones They appear first in palms and soles in the fourth gestational month The duct becomes continuous with a corkscrew-shaped cleft between epidermal cells- The secretory tubules is lined by simple cuboidal epithelium A. APPOCRINE B. ECCRINEExplain how glands are classified.State the function of heterocrine gland?