Vena Cava Cranialis and - Venous BS of the THORAX

Question 1

Side?

Answer 1

RIGHT SIDE

Question 2

VENA CAVA CRANIALIS

Main Branches

Answer 2

1. V. Azygos Dextra *
2. V. Costocervicalis dextra*
3. V. Thoracica interna*
4. V. BRACHIOCEPHALLICA*
5. V. JUGULARIS EXTERNA

Question 3

VENA CAVA CRANIALIS

5. V. Jugularis externa

Answer 3

5. V. Jugularis externa
   Recieves blood from:
   - V. Maxillaris
   - Tr. Linguofacialis

• V. Jugularis Interna

Drain into:
- Brachiocephallica –> then into V.Cava cranialis

Question 4

VENA CAVA CRANIALIS

Answer 4

4. V. BRACHIOCEPHALLICA*
Recieves blood from:
- V. Sublavia sinistra
- V. Jugularis Externa et interna
- V. Subclavia dextra

Drains into V. Cava Cranialis

Question 5

3. V. Thoracica interna*

Answer 5

Drains into V. Cava Cranialis

Question 6

2. V. Costocervicalis Dextra

Answer 6

2. V. Costocervicalis Dextra
Recieving blood from:
- V. Vertebralis
- V. Scapularis Dorsalis
- V. Cervicalis Profunda
  - v. Vertebralis thoracica
  - Rr. Intercostalis dorsalis

Drains into:
V. Cava cranialis

Question 7

1. V. Azygos Dextra *

Answer 7

Recieves blood from :

• Vv. Intercostalis dorsalis
• V. Bronchooesophagea

Drains into:
V. Cava cranialis

Question 8

Interspecial Differenses

EQ

Answer 8

1. Vv. Jugularis externa
   Drains into:
2. Truncus Jugularis

VENA CAVA CRANIALIS:
Collecting blood directly from:
1. Truncus Jugularis
2. V. Subclavia
3. V. Thoracica interna
4. V. Vertebralis
5. V. Azygos deztra with vv. intercostalis

Question 9

Interspecial Differenses

Ca

Answer 9

V.Jugularis and V.Subclavia drains into

V. Brachiocephallica –> V.cava.cran

Question 10

Aortic arch branches:

Answer 10

● Brachiocephalic trunk

● Subclavia sinistra

Question 11

Thoracic aorta Branches:

Answer 11

1. ● Aa. Intercostales dorsales:
   supply wall of thorax
   ○ Rami spinales: branches to spinal cord
2. ● A. Broncho-oesophagea
   ○ Bronchial branches
   ○ Oesophageal branches
3. ● A. Costoabdominalis:
   supplies abdominal wall
4. ● Eq: A. Phrenica cranialis:
   supplies diaphragm

Question 12

VENOUS Bloodsupply of the thorax

Answer 12

Cranial vena cava
● V. Jugularis (all domestic mammals except eq and goat have 2 pairs of jugular
veins, internal and external)

● V. Subclavia sin/dex

● V. Broncho-oesophagea

● Eq, ca, fe: right azygos vein

● The cranial vena cava passes through the cranial mediastinum to the right of the
brachiocephalic trunk and opens into the right atrium