Test 4: lactation Flashcards
suckle
To give a neonate milk from an udder
– To draw milk from the udder
Suckling
A young unweaned animal
Lactation
Production of milk
– Period following parturition when milk is secreted from
mammary glands
protherian
monotremes
platypus
young hatched from egg
mammary gland has no nipples
milk secreted onto hair
methatherian
marsupials
Short gestation
- Offspring not well developed at birth
- Young crawl to nipple and remain attached delayed implantation
___ are true placental mammals
eutherian
primary mammary bud (ectodermal)
secondary mammary bud
3rd step of mammary development: primary, secondary, canalization
camel has how many teats
4 teats with two canals per teat
cows have how many teats
4 teats: 1 canal/cistern
mare have how many teats
2 with 2-3 ducts per teat
goats have how many teats
2 teats: 1 canal/cistern
ewe have how many teats
2 with 1 canal/cistern
how many teats for sow
a bunch with 2-3 ducts per teat
bitch have how many teats
8- abdomen and thoracic with 5-6 ducts per teat
primates have how many teats
2 with 8-10 ducts per teat
suspensory system of the udder
medial and lateral suspensory ligamant
milk vein
develops in cows
subcutaneous abdominal vein
yellow elastic tissue is found where in the udder
midline → strong suspensory
lacting buck→ holding the scrotom
do stallions have teats?
no
do boars have teats?
yes
3 ways to prevent infection in mammary gland
Physical Barriers
– Streak canal (smooth muscle, keratin)
– Rosette of Furstenberg
Cellular Immunity
– Granulocytes, lymphocytes, macrophages
Humoral immunity
– Immunoglobulins
what secrete milk
secretory epithelium of the alveoli, larger ducts and gland cistern
The alveoli and ducts are surrounded by ____that contract to allow milk letdown to occur.
myoepithelial cells