Mammary glands Flashcards
Where are the greats located?
- Anterior thoracic wall
- Pectoral region
What are the key structures of mammary glands involved in ?
Lactation
Which intercostal cartilages do the breast span between ?
2nd and 6th intercostal cartilages
The breast lies superficially to what muscles ?
Pectorales majo and serrates anterior muscles
What are the two regions of the breast ?
- Circular body
- Axillary tail
Circular body
Largest and most prominent part of the breast
Axillary Tail
Smaller part which runs along the inferior lateral edge of the pectorals major and towards the axillary fossa.
What is the pigment surrounding the nipple called?
Areolae
What is the location of the nipple and what is it composed of?
- Center
- smooth muscle fibers
What happens to the sebaceous glands during pregnancy ?
-They enlarge secreting an oily substance the acts as a protective lubricant for the nipple.
What are mammary glands?
Modified sweat glads
What do mammary glands consist of ?
They consist of a series of ducts and secretory lobules (15-20).
Lactiferous ducts
Converge at the nipple like spokes of a wheel
What vessel provides arterial supply to the medial aspect of the breast?
Internal thoracic artery
Which nodes receives the majority of breast tissue lymph?
Axillary
Which of the following hormones from the anterior pituitary control secretion of breast milk
Prolactin
Fibrosus Stroma
-Condenses to form suspensory ligaments of Cooper.
What are the functions of the the ligament of Copper ?
- Attach and secure the breast to the dermis and underlying pectoral fascia.
- Separate the secretory lobules of the breast
Pectoral Fascia
-Acts as an attachment point for the suspensory ligaments
Retromammary space
Layer of loose connective tissue between the breast and pectoral fascia
-Potential space often used in reconstructive plastic surgery .
Lateral part of the breast receives blood supply from which four vessels ?
- Lateral thoracic
- Lateral thoracoacromial branches
- Lateral mammary branches
- Mammary branch
Where do the veins of the breast drain into ?
-Axillary and internal thoracic veins
Lymphatic drainage plays a role in what ?
Metastisis
Skin drains into what ?
-Axillary , inferior Depp cervical and infraclavicular nodes
Nipple & areola drains into what?
-Subareolar lymphatic plexus
What is the breast innervated by ?
-Anterior and lateral cutaneous branches of the 4th to 6th intercostal nerves.
Where is prolactin secreted from ?
Anterior pituitary glands
