Milk is the characteristic secretion of the mammary gland and serves for nourishment of the young. The first milk after parturition, the colostrum, has a high antibody content, which provides the newborn with passive immunity. Because of its composition, milk of ruminants, especially of cows, is an important component of human food. | Milk is the characteristic secretion of the mammary gland and serves for nourishment of the young. The first milk after parturition, the colostrum, has a high antibody content, which provides the newborn with passive immunity. Because of its composition, milk of ruminants, especially of cows, is an important component of human food. |