B6 - Aorta abdominalis, v. cava caudalis

Question 1

Aorta abdominalis

1. Name the branches
2. Draw

Answer 1

• Begins after passing through hiatus aorticus of the diaphragm
• The aorta lies to to left of vena cava caudalis and contacts the thoracic duct and the inner lumbar muscles dorsally

1. A. phrenica caudalis (ø eq) → tr. phrenicoabdominalis (ca)
   
   1. Ca: A. abdominalis cranialis
   2. Ca: A. prhenica caudalis???
   3. usually arises in company with a. abdominalis cranialis
2. Aa. lumbales
   
   • Corresponds to number of lumbar vertebrae
   • Pattern of branching resembels that of the a. intercostalis dorsalis
3. A. coeliaca
   
   1. ​A.gastrica sinistra
   2. A. hepatica
      
      1. ​A. gastrica dextra
      2. A. gastroepiploica dextra (anastomoses with a. gastroepiploica sinistra)​
   3. A. lienalis
      
      1. ​A. gastroepiploica sinistra (anastomoses with a. gastroepiploica dextra)
4. ​A. mesenterica cranialis (given off between L4-L6, species dependent)
   
   1. ​A. pancreatoduodenalis caudalis
   2. Aa. jejunalis
   3. A. ileocolica
5. A. renalis dextra (arises further cranial than a. renalis sinistra)
6. A. renalis sinistra
7. ​A. testicularis/ovarica (arises between L3-L5, species dependent)
8. A. mesenterica caudalis
9. _A. circumflexa ilium profunda_ (ca??)
10. A. iliaca externa sin/dex → a. femoralis
11. A. iliaca interna sin/dext
    
    • ​​Supplies the pelvic organs
12. A. sacralis mediana

Question 2

Vena cava caudalis

Answer 2

• Collects blood from the hindlimbs and pelvic organs
• Arises from the caudal part of the sinus venosus of the right atrium
• Gose through foramen venaca cavae in centrum tendineum of the diaphragm
• Turns dorsal in the abdomen
  
  • Runs between right crus of the liver
• Runs dorsally over the liver, and creates the sulcus venace cavae of the fascies diaphragmatica of the liver
• Biforcates into vv. iliacae communis caudal in the lumbar region
• It passes between the caudal and accessory lobes of the right lung

1. V. phrenicae cranialis*** & ***v. abdominalis cranialis (ca)
2. V. prenicae caudalis
3. Vv. hepaticae
4. Vv. lumbales
5. V. renalis
   
   • ​Sus: ​v. abdominalis cranialis
   • Ru, eq: r. suprarenalis
   • Ca: v. renalis sinistra → v. testicularis ovarica sinistra
6. V. testicularis/ovarica
   
   • ​Male: forms plexus pampiformis with arteries??
   • Females: large major vein of the uterus
7. V. circumflexa ilium profunda
   
   1. ​Ca, ox, eq: duplicated

Brances that joins throught the vv. hepatica after passing through the liver (v. portae):

1. V. iliaca communis​
   
   1. ​V. circumflexa ilium profunda (ø ca)
   2. V. iliolumbalis

Question 3

Vena cava caudalis

Draw the terminal subdivision of the caudal vena cava, interspecies differences

Answer 3

• ventral view