Mammary System Flashcards
a distinguishing feature of mammals is
production of milk
the mammary glands are composed of what
apocrine glands or merocrine glands, AND a duct system
apocrine gland
a gland that loses part of the cell during secretion
merocine gland
a gland that does not lose part of the cell during secretion
secretion of milk proteins via exocytosis
the mammary gland is what kind of gland
apocrine gland
external opening of the mammary gland
streak canal
_____ has a streak canal for each mammary gland
teat or nipple
T or F: the number of teats and number of mammary glands per teat are different in eat species
true
the three ways mammary glands can be in different species are
pelvic (inguinal)
abdominal
pectoral ( thoracic)
Oxytocin is
a hormone that is excreted from the posterior pituitary
oxytocin is responsible for
milk let-down in mammals
STRUCTURES
external appearance
teat or breast
the mammary gland includes
alveoli and collecting ducts drained from the teat by a single streak canal
mammary glands are _______ producing _______
milk; tissue
external part
teat
the teat is used for
suckling offspring
alveolus
hollow ball of cells
the alveolus forms and secretes
milk
myoepithelial cells
contractile cells that surround the alveolus
what contracts to force milk into the duct system
myoepithelial cells
fine duct system/alveolar ducts
connects the alveoli to the collecting ducts
collecting ducts
collect milk from the fine duct system and transport the milk to the gland cistern
gland cistern
collects milk from the collecting ducts and stores it
what is the largest storage area of the mammary gland
gland cistern
teat cistern
collects secreted milk from the gland cistern
streak canal
milk exit out of the teat from the teat cistern
what 2 structures are not present at the birth of a female
alveoli and fine duct system
estrogen regulates
ductal growth in the mammary system
what is needed to support the weight of the udder or breast
ligaments
medial suspensory ligament
provides the primary support for the udder
lateral suspensory ligaments
provide additional support
skin
provides a small amount of support for the udder and provides protection from microorganisms
what ligament runs down the middle of the udder
medial suspensory
what ligament is located on the sides of the udder
lateral suspensory
pudic artery
main blood supply to the udder
what are the 2 blood return pathways to the heart
subcutaneous abdominal veins (milk veins) and pudic veins
