Repro: Breast Flashcards
Accessory organs of female reproductive system. Secretes milk for infant(lactation)
Mammary glands
Found at the anterior surface of the thorax, overlying pectoral muscles. Extend towards the axilla forming axillary _________. Well developed in _______ & Rudimentary in _______.
Breast. Axillary tail. Female. Male.
Breast grows during _______ (___-___ years of age)
Puberty. 12-15.
Areola enlarge. Each _______ is drained by Lactiferous ducts which opens to the _______.
Lobule. Nipple.
Give rise to buds that form _______ lobules of glandular tissue.
Lactiferous ducts. 15-20.
Each duct has a dilated portion called _________ where milk accumulates during lactation.
Lactiferous sinus
The bulk of the breast tissue is _________ interspersed with connective tissue.
Adipose tissue
Breast ducts comprise only _____ of the breast mass. Lobes, ducts & lymph nodes.
10%
Breast has no _________. These are only seen underneath the breasts separating them from the ribs.
Muscle tissue
Each breast has ____ sections (______) arranged like the petals of daisy.
8-10. Lobes.
Inside each lobule are many smaller structures called
Lobules
At the end of each lobule are tiny sacs (_______) that can produce milk.
Bulbs
Lobes, lobules and bulbs, are linked by a network of thin tubes known as
Ducts
Ducts carry milk from bulbs toward dark area of skin in the center of the breast known as
Areola
Ducts join together into larger ducts ending at the _______, where milk is delivered.
Nipple
What happens during birth, 2 years & after puberty in the development of the breast ductal tree
Proliferation
What happens after pregnancy in the development of the breast ductal tree
Proliferation & Differentiation
Amount of ____ surr the glandular tissue determines size of breast.
Fat
_______ contain numerous sebaceous (_______) glands, which enlarge during pregnancy & secrete oily substance that provides a protective lubricant for the areola and nipple. Variable in size & color.
Areola. Montgomery.
Areola is light colored in
Nulliparous women
Areola darkens to brown during
First pregancy
Conical or cylindrical prominences. Located at the center of areola. No fat. Located at the level of _______ (nulliparous) position varies.
Nipples
Fissured and contains openings of lactiferous ducts
Tip of nipples
Nipples is composed of __________ fibers that compress the lactiferous ducts and erect the nipples when they contract.
Circular smooth muscle
No capsule or sheath. Lies in superficial fascia. Separated from pectoral muscles by _______.
Mammary gland. Deep fascia.