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Title: Breast anatomy
Description: Details the structure of breasts, including blood and nervous supply, as well as some clinical aspects. Diagrams included for reference.
Description: Details the structure of breasts, including blood and nervous supply, as well as some clinical aspects. Diagrams included for reference.
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Breasts
Breasts
Glandular and supporting fibrous tissue embedded in a fatty matrix
along with blood vessels, lymphatics and nerves
Mammary glands located in the subcutaneous tissue overlying the
pectoralis major and minor muscle
Nipple surrounded by areola (pigmented area of skin)
Accessory to reproduction in women, redundant in men
Female breasts
Fat surrounding the glandular tissue determines size of non-lactating
breasts
Bed of the breast extends from lateral sternum to the mid-axillary line,
and from 2-6 ribs
o 2/3 formed by pectoral fascia of pectoralis major
o 1/3 formed from fascia of serratus anterior
Retro-mammary space is a potential space located between the
breast and pectoral fascia – contains fat, allowing some movement
Axillary process is the extension of the mammary gland toward the
armpit
Mammary glands firmly attached to overlying skin and anchored by
suspensory ligaments (of Cooper)
o Fibrous connective tissue
During puberty, the breasts enlarge mostly due to gland development
but also due to increased fat deposition
o Areola and nipple enlarge
o Lactiferous ducts give rise to buds that develop into lobules
(parenchyma)
Each lobule is drained by a lactiferous duct, which dilate to form a
lactiferous sinus deep to the areola
Suckling by a neonate results in compression of the areola and
expression of the milk droplets
Areola contains sebaceous glands, which enlarge during pregnancy
and secrete an oily substance as lubricant
Nipples are conical prominences in the centre of the areola – no fat,
hair or sweat glands
Lactiferous ducts open up into the nipple, with circularly arranged
smooth muscle that compress lactiferous ducts during lactation and
erect in response to stimulation
Taken from Studyblue
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studyblue
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Image taken from Moore et al, Clinically Oriented Anatomy, Seventh Edition
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Moore et al
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Seventh Edition
Title: Breast anatomy
Description: Details the structure of breasts, including blood and nervous supply, as well as some clinical aspects. Diagrams included for reference.
Description: Details the structure of breasts, including blood and nervous supply, as well as some clinical aspects. Diagrams included for reference.