Mammals are a class of animals characterized by specific features, including the ability to nourish developing young inside the mother's body during gestation and providing milk for postnatal nourishment. The nourishing process happens through a special structure called the placenta.
After birth, young mammals depend on their mother's milk to fulfill their nutritional requirements. Mammalian milk is a rich source of proteins, fats, carbohydrates, vitamins, and minerals essential for the proper growth and development of developing offspring.