Milk
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Milk is a nutritious liquid that is produced by mammals that contains proteins, fats, carbohydrates, vitamins, minerals and water. Though all female mammals produce milk, humans consume almost all of their milk from ruminants, mainly cows and buffaloes. Ruminants are a group of mammals that have a specialized digestive system that allows them to ferment plant-based food in a chamber called the rumen before digesting it. They are able to extract more nutrients from plants than other herbivores by using microorganisms in the rumen. Female ruminants produce milk because they have mammary glands that are stimulated by hormones during pregnancy and lactation. Male ruminants do not have functional mammary glands, so they cannot produce milk. Dairy cattle are ruminants, which means they have a four-compartment stomach that allows them to digest fibrous plant materials such as grasses, hay, silage, and grains. Stomach of Ruminants: The stomach of ruminants is a complex organ that consis