ocr: MAMMALS IM AMMALS vertebrates. are They endothermic are the the young young to mammals the drink placenta. milk After from birth, their only animals with fur or hair on their mother's mammary (milk-producing) body, andear flaps. Most mammals glands until they are old enough to eat are placental mammals. This means the adult's diet. Milk is the ideal food that their young develop inside the for a young mammal: it mother'suterus, nourished by an contains all the nutrients organ called the placenta. The that it needs for growth umbilical cord connects and development. Placental mammal A dog'sgest ...