Question

what were the uses of mammary glands in the ancestral male humans?​

Answer 1

mammary gland in male now become a vestigial organ i.e. no uses of it

Answer 2

$\tt\pink{\underline{\underline{Mammary\:Gland}}}$

→Human female has a pair of mammary gland (Breasts) that contain glandular tissue and fatty tissue.

→Each glandular tissue is divided into 15 to 20 Mamali lobes consists of a group of alveoli.

→The alvali open into mammary tubules

→The mammary tubules of each lobes open into small mammary duct.

→Several mama redux join to form a wider memory ampulla that is connected to lactiferous duct just before the nipple through which milk is released.