cows produce milk;but why do we not see the origin of the milk when slaughtered

Question: cows produce milk;but why do we not see the origin of the milk when slaughtered
- Keywords:
  cow,
  milk
Asked by abpb279 to Cheryl, Christina, Daniel, George, Ivy on 20 Jan 2017. This question was also asked by CUBBY.
- Cheryl Andisi answered on 20 Jan 2017:
  
  @abpb279.
  good question!
  cows, and humans fall in the group of organisms known as mammalia, which are basically organisms that have some of their sweat glands modified into mammary glands that they use to produce milk and feed their young ones. These glands have cells that secrete milk once they get a signal from the brain. this implies that there is isnt a store where this milk comes from…. it is secreted when required and is only temporarily stored within the breasts before feeding of the young one

Question: cows produce milk;but why do we not see the origin of the milk when slaughtered