Hello! This question is incomplete, but after doing some research on the Internet, I managed to find the picture missing, so I'm attaching it here with the correct answers resolved by me.
The gland in the picture is an APOCRINE GLAND. Apocrine glands are a type of exocrine gland (meaning that they secrete their product onto a duct made of epithelium) that lose their apical portion when they excrete the substance they produce. The product secreted may be contained in secretory vesicles surrounded by the plasma membrane or dissolved in the lost cytoplasm.
This specific apocrine gland appears to be a mammary gland since its product is milk.
