Mammary glands are a distinguishing characteristic of mammals, and are responsible for the production and secretion of milk during lactation. They develop from the embryonic mammary ridge and undergo significant changes throughout a mammal’s life. In this article, we will explore the evolution, composition, and functions of mammary glands, and provide insights into the latest research in this field.The Evolution of Mammary Glands in MammalsThe evolution of mammary glands can be traced back to the ancestor of modern-day mammals. These glands have evolved from apocrine sweat glands through a process known as exaptation, or the adaptation of an existing structure…