mammaries

Mammaries, commonly referred to as breasts, are a defining characteristic of female mammals. They are specialized glands that produce milk, a nutrient-rich substance essential for nourishing offspring after birth. In humans, mammaries develop significantly during puberty under the influence of hormones like estrogen and progesterone. This development results in the growth and enlargement of the mammary glands and the surrounding adipose tissue.

The primary function of mammaries is lactation. Following childbirth, hormonal changes stimulate the mammary glands to produce milk. This milk is then expelled through a network of ducts that converge at the nipple, allowing the infant to feed. The composition of milk varies between species, providing the optimal balance of nutrients for each species' young.

While the production of milk is their primary biological role, mammaries also possess sensory and sexual significance in many species, including humans. Their appearance and development can be influenced by factors such as genetics, body weight, and age. Changes in mammary tissue, such as lumps or pain, can sometimes indicate underlying health conditions, necessitating medical evaluation. The structure of mammaries involves glandular tissue, ducts, connective tissue, and adipose tissue.