Image: Wikimedia Commons

breast

Upper region of primate torso

Entityorgan type class of anatomical entity sexual characteristicQ9103

Also known as boob · tit · bosom · booba

Instance of: organ type
, class of anatomical entity
, sexual characteristic
Subclass of: breast
, mammary gland
, region of pectoral part of chest
1
Sources
1.Stated in Foundational Model of AnatomyRetrieved 2019-08-01
View statement on Wikidata ↗
+2 more
Part of: thorax
, body
, secondary sex characteristic

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The breasts are two prominences located on the upper ventral region of the torso in humans and other primates. Both sexes develop breasts from the same embryological tissues. The relative size and development of the breasts is a major secondary sex distinction between females and males. There is also considerable variation in size between individuals. Permanent breast growth during puberty is caused by estrogens in conjunction with the growth hormone. Female humans are the only mammals that permanently develop breasts at puberty; all other mammals develop their mammary tissue during the latter period of pregnancy.

Overview

All data

31 statements · 10% with external sources · numbers in brackets are citations

Has use: breastfeeding
Arterial supply: internal thoracic artery
Venous drainage: internal thoracic vein
Different from: male breast
Meme criterion used: descriptive page and disambiguation page have to be in different items · applies to name of subject: meme
Sexually homologous with: male breast

On other databases

11 identifiers linking breast across the web's reference databases

Data quality

statements

10%

externally sourced

Source last edited October 15, 2026. AIDB refreshes this page daily.

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Cite this page

AIDB. (2026). breast (Q9103). Retrieved from https://aidb.si/e/breast-Q9103