Anatomy E4 IV, Mammae
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Which Pair of mammae develop in...
- Porcine: Thoracic (thoracoinguinal) Pair
- Ungulates: Inguinal Pair
Where are supernumerary teats found in...
- Cow: Caudo-Ventral surface of the udder
- Ewe/Doe: Cranial
Number of mammae in...
- Cow: 4
- Small Rum: 2
- Sow: 10-18
- Mare: 2
Which species have hemispherical mammae?
Which species have pendulous, sac-like mammae?
How many Mammae do cows have?
How many mammary glands/mammae in the cow?
1 mammary gland/mammae
How many mammae do ewes have?
Each mammae of the ewe contains:
- 1 Lactiferous Sinus
- 1 Papillary duct
How many pairs of mammae does the sow have?
How many mammary gland per mamma in the Sow?
How Many Teat Orifices?
- 2-3 mammary glands/mamma
- 2-3 teat orifices/mamma
How many mammae do Nannies have?
2, 1 pair
How many mammary glands/mammae are found in the Nanny?
6-9 mammary glands/mammae
In the cow, the mammae may extent from ___ to ___
Umbilicus to Labia
What divides the L & R halves of the bovine mammae?
Median Intermammary Groove
Each half of the cow's mammae is divided into ___& ____
Fore- and Hind-quarters
What divides the Fore- & Hind-Quarters of the cow's mammae
Transverse Intermammary Groove
Which parts of the cow's mammae have distinct duct systems, yet the groove is poorly defined?
Fore & Hind quarters
Why is the tranverse intermammary groove poorly defined?
The glandular Tissue intermingels
Tissue layer contents/characterisitics of the cow's teats:
- Skin Sensitive
- Middle layer of CT, Smooth muscle fibers & Highly coiled, thick walled veinsInner Layer Mucosal lining of Lactiferous sinus
What can induce a hard milker?
- Rosette of Furstenberh
- Tight Papillary Sphincter
(Pathway of milk through the mammary gland)
- Intralobular Duct
- Interlobular Duct
- Lactiferous Sinus
- Gland Sinus
Two parts of the Lactiferous Sinus are the ____ & ____
- Glandular Sinus & Papillary Sinus
Where can excessive bleeding occur within the teat?
At the venous plexus within in the Mucosal Fold btw the Papillary and Glandular Sinuses
What forms the palpable milk nodes?
Dilated and Constricted Segments of the lactiferous Ducts
The suspensary apparatus is composed of:
- Lateral Lamina
- Medial Lamina
Which Lamina of the cow's suspensory App arises from the Deep Fascia of the Abd Wall & Symphyseal Tendon & contains BV, Nerves, & Paranchyma
Whichl Lamina of the cow's suspensary App contains Yellow Elastic Tissue
Yellow Elastic Tissue
Heavy teats will point in which direction?
In the cow suspensary App, each Lamina is seperated by...
In the cow's suspensary app, the lamina are thickest at which end?
Within the cow's Suspensory App, what are the lamina that project into the substance of the udder?
To produce 1L of milk, how many L of blood must pass through the cow's udder?
Major blood supply to the cow's udders
In the cow, the External Pudendal A gives rise to:
- Cranial Mammary A (AKA Superficial Caudal Epigastric)
- Caudal Mammary A
What forms the Arterial Circle within the cow's udder?
- Mammary Arteries
- Areas of Anastomoses
What other A supplies a small amount to the cow's udders?
The Cranial Mammary A (Superficial Caudal Epigastric) in the cow anastomoses with the
Superficial Cranial Epigastric
Cranial Superficial Epigastric (AKA Subcutaneous Anbdominal Vein)
Venous Drainage from the Cows udder (5):
- Veinous Ring
- Ca Superficial Epigastric
- Cr Superficial Epigastric
- Milk Well
- Internal thoracic
In the cow's udder, where can blood flow in either direction?
Superficial Caudal Epigastric V
What supplies sympathetic innervation to the skin, Middle/Caudal parts of the udder & Parenchyma of the udder?
What supplies innervation to the skin and teats of the Cr udder in the cow?
- Iliohypogastric (L1)
- Ilioinguinal (L2)
- Cr Branch of the Genitofemoral (L3)
What supplies the Caudal Aspect of the Udder's skin in the cow?
Mammary Branch of the Perineal (pudendal)
How many Superficial Inguinal Lnn's are found in...
The Superficial Inguinal/Mammary lnns drain:
- Medial Aspect of the thigs
Superficial Inguinal Ln Efferents to the
Deep Inguinal Ln (iliofemoral)
Clinical Significance of the Deep Inguinal lnns
What additional ln drains thoracic and cranial abd mammae in pigs?
Lumbar/High Epidural Block
Site of injection:
- Site of injection: Btw L1 & L2 Spinous Process
- Nerves blocked: T13, 1 & L2
With which epidural block can a larger amount of anesthetic be used?
High Epidural block desensitizes which areas (5)?
Which block is used more often for goats, sheep and pigs?
Sacrocaudal/Low Epidural Block
- Site: Cd1 & Cd2
- Nerves: Last 3 Sacral
Low Epidural Block Desensitizes which areas (3)?
- F Tubular Genitalia
Which block is facilitated by lifting the tail head and locating a kink?
When should extra measures be taken to mastitis?
- Dry Period
- Near Calving
- Early Lactation
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