ahealthyme - Everything to live a healthier life
Menu
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A-Z Listings Featured Tools
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Click a letter to see a list of medical procedures beginning with that letter.
Click 'Back to Intro' to return to the beginning of this section.

Anatomy of the Breasts

Each breast has 15 to 20 sections, called lobes. They are arranged like the petals of a daisy.

Each lobe has many smaller structures called lobules. These end in dozens of tiny bulbs that can make milk.

The lobes, lobules, and bulbs are all linked by thin tubes called ducts.

These ducts lead to the nipple in the center of a dark area of skin called the areola.

Fat fills the spaces between lobules and ducts.

There are no muscles in the breast, but muscles lie under each breast and cover the ribs.

Each breast also contains blood vessels and vessels that carry lymph. The lymph vessels lead to small bean-shaped organs called lymph nodes. These lymph nodes are found in clusters under the arm, above the collarbone, and in the chest. They are also in many other parts of the body.

Three-quarter view of female head, neck, and chest with raised right arm showing anatomy of right breast and lymph nodes.

Online Medical Reviewer: Diane Horowitz MD
Online Medical Reviewer: Donna Freeborn PhD CNM FNP
Online Medical Reviewer: Heather M Trevino BSN RNC
Date Last Reviewed: 1/1/2023
© 2000-2023 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.