This is a cluster of secretory regions of a typical eccrine sweat gland . The eccrine glands are one of the two types of sweat glands most mammals have. The beads of sweat that run down your head when you mow the grass come from this sort of gland.
Eccrine glands have long ducts that run up to the surface and open out onto the skin.
Eccrine glands can be found anywhere along the integument. The second type of sweat gland is the apocrine sweat gland . These are much larger than eccrine glands and they produce a secretion that's quite a bit different. The secretory cells of apocrine glands pinch off a bit of their cytoplasm and cast it off into the lumen of the gland. This cast-off cytoplasm necrotizes and liquefies, producing lipids of varying chain lengths.