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Comparitive Anatomy Unit 6 part 2
Dr. Cross's second part of Unit 6 of MU Undergraduate Anatomy
83
Anatomy
Undergraduate 3
07/12/2011

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Term
a ventral projection from the mam gland
Definition
papilla
Term
papilla are termed what?
Definition
teats or nipples
Term
halves of the udder are divided externally by the what?
Definition
intermammary grove
Term
the intermammary groove corresponds to what?
Definition
median septum
Term
secretory units of the mam glands
Definition
alveoli
Term
the mam glands are lined by which epithelium?
Definition
simple
Term
myoepithelial cells respond to what hormone?
Definition
oxytocin
Term
the terminal portion of the duct system of the mam glands
Definition
lactiferous sinus
Term
technical term for gland systern
Definition
pars glandularis
Term
technical term for the teat cistern
Definition
pars papillaris
Term
the parynchyma is under what hormonal control?
Definition
estrogen and progesterone
Term
teat cister/papillary duct is also known as which two canals?
Definition
teat or streak
Term
the streak canal is how long in a cow?
Definition
8.5 mm
Term
what is the name of the opening of the teat?
Definition
ostium papillae
Term
how much does a lactating dairy cow's udder weigh?
Definition
60kg/ 132 lbs
Term
the primary support of the udder
Definition
medial laminae
Term
medial laminae is thickest where?
Definition
close to the body
Term
dense white connective tissue that is less elastic than medial laminae
Definition
lateral laminae
Term
cranially, the lateral laminae derives from what tissues near the inguinal ring?
Definition
aponeurotic
Term
caudally, the lateral laminae is derived from what?
Definition
the pelvic symphysis and prepubic tendon
Term
where is lateral laminae thicest?
Definition
close to the body
Term
what mainly supplies the mam glands with blood?
Definition
external pudendal artery/pudendoepigastric trunk
Term
what supplies the cuadal part of the udder with blood?
Definition
ventral perineal artery
Term
what gets blood from all 4 quarters?
Definition
external pudendal veins
Term
the external pudendal veins are continuous with what?
Definition
the caudal superficial epigastric vein
Term
caudal superficial epigastric veins join cranial with what?
Definition
cranial superficial epigastric veins
Term
cranial superficial epigastric veins dcrain into what?
Definition
internal thoracic veins then the vena cava
Term
milk vein is aka
Definition
subcutaneous abdominal vein
Term
where the milk veins pass through the rectus abdominus M
Definition
milk well
Term
what drain the entire udder to the superficial inguinal lymph nodes?
Definition
lymphatic vessels
Term
lymphatic vessels drain the entire udder to what?
Definition
superficial inguinal lymph nodes
Term
superficial inguinal lymph nodes are located where?
Definition
near the superficial inguinal rings
Term
how many mam glands in a bitch?
Definition
10
Term
in the queen, how many mam glands?
Definition
8
Term
number of ducts in each teat of a cat or dog
Definition
7-16
Term
intact female dogs that are older have issues with what?
Definition
neoplasia
Term
hypertrophy of female mam glands is under the influence of which hormone?
Definition
progesterone
Term
early embryo that enters uterus at 5-6 days after fertilization
Definition
blastocyst
Term
the inner cell mass of a blastocyst develops into what?
Definition
embryo proper
Term
(not including the inner cell mass, the remainder of the blasto cyst is termed what?
Definition
yolk sac
Term
what is the layer of cells surrounding the yolk sac?
Definition
trophoblast
Term
when the trophoblast penetrates endometrium it's termed
Definition
implantation
Term
"implnatation" occurs in what animals?
Definition
rodents, primates, and carnivores
Term
in what animals is the trophoblast non-invasive?
Definition
ruminants, swine and equids
Term
endometril cups are what animal?
Definition
mare
Term
when trophoblastic cells invade the endometrium it is then termed
Definition
endometrial cups
Term
binucleate cells are what animal?
Definition
ruminants
Term
when trophoblastic cells invade the endometruim and fuse with other cells it becomes what?
Definition
binucleate cells
Term
the placenta develops from what?
Definition
the trophoblast
Term
outermost layer of the placenta
Definition
chorion
Term
second layer of the placenta
Definition
allantois
Term
fluid filled cavity connected to the fetal urinary bladder
Definition
allantois
Term
chorion and allantois fuse to form the
Definition
chorioallantois
Term
the innermost layer of the placenta
Definition
Term
the umbilical chord consists of what?
Definition
2 umbilical aa, an umbilical v and the urachus
Term
the umbilical a carries O2 blood from the placenta to the what?
Definition
fetal liver
Term
what is a "water break" technically?
Definition
rupture of the allantoic cavity followed by the amnionic cavity
Term
after birth, the umbilical aa close and are termed what?
Definition
round ligg. of the urniary bladder
Term
after birth, the umbilical v becomes what?
Definition
the round lig. of the liver
Term
after birth, the urachus degenerates and forms a scar where?
Definition
on the apex of the bladder
Term
what is the different types of placentae based on?
Definition
the degree of cellular barriers b/t the maternal and fetal sides
Term
type of placenta that the layers of the maternal and fetal sides are in close apposition
Definition
epitheliochorial
Term
what animals have an epitheliochoral placenta?
Definition
ruminants, swine and equids
Term
type of placenta in which the chorionic layer is in contact with the endothelium of maternal blood vessels
Definition
endotheliochorial
Term
what animals have an endotheliochorial placenta?
Definition
dogs and cats
Term
type of placenta where the blood vessels in the endometrium is penetrated by the chorion
Definition
hemochorial
Term
what animals have a hemochorial placenta?
Definition
primates
Term
what is a second method on how to differ placentae?
Definition
gross appearance
Term
what would a diffuse placenta look like?
Definition
velvety b/c of microvili covering the chorioallantois
Term
microvili on the swine and equid placenta interdigiate with endometrial crypts to facilitate what?
Definition
nutrient transfer
Term
what animals have a diffuse placenta?
Definition
swine and equids
Term
what animals have a cotyledonary placenta?
Definition
ruminants
Term
on the endometrial side of a cotyledonary placenta there are projections called what?
Definition
caruncles
Term
what intergrate with the caruncles of the cotyledonary placenta fo form placentomes?
Definition
cotylendons
Term
cotyledons of the cotyledonary placenta interdigiate with the caruncles to form what?
Definition
placentomes
Term
placentomes are called what by producers?
Definition
buttons
Term
what havew a zonary placenta?
Definition
dogs and cats
Term
type of placenta in which the area of attachment is b/t the chorioallantois and the endometrium and foms a band
Definition
zonary placenta
Term
some maternal tisse is lost at partition
Definition
deciduate
Term
maternal tissue not lost at parturition
Definition
indeciduate
Term
what doesnt occur that makes freemartins not a problem in horses?
Definition
anastomoses
Term
sterile hefer that was born with a bull calf
Definition
freemartin
Term
umbilical torsion is due to what?
Definition
abnormally long umbilical cords
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