IBCLC Practice Exam 2026 – All-in-One Guide to Excelling in Your Lactation Consultant Certification!

The correct answer is the parenchyma, as it refers to the functional tissue of an organ. In the context of the breast, parenchyma encompasses the glandular tissues responsible for milk production, including the alveoli, which are the tiny sac-like structures where milk is synthesized and stored. The alignment of these functional components within the parenchyma is crucial for the physiological processes of lactation.

In contrast, the stroma primarily provides the supportive framework for the glands and ducts, consisting of connective tissue and blood vessels, but does not include the milk-producing alveoli. Adipose tissue is mainly responsible for providing energy reserves and cushioning, contributing to the overall structure but not directly involved in milk production. Connective tissue offers structural support but also lacks the functional elements necessary for lactation. Understanding these differences is vital for recognizing how the breast's anatomy supports its role in breastfeeding.