14- Ruminant Thoracic Cavity

Question 1

Which ribs in a ruminant are sternal, asternal, and floating?

Answer 1

1-8: sternal
9-13: Asternal
NO FLOATING

Question 2

How are bovine lungs different compared to equine?

Answer 2

• pronounced lobation (compared to equine that don’t have distinct external lobes)
• Lobulated- thick connective tissue septa

Question 3

What is unique about right bovine lung?

Answer 3

Extra hilus in addition to the central hilus

Question 4

What is the red arrow pointing to?

Answer 4

Tracheas bronchus- courses to the right cranial lobe
unique to ruminants

Question 5

Answer 5

Pulmonary ligament

Question 6

Answer 6

Plica for caudal vena cava and right phrenic nerve

Question 7

Answer 7

1) cardiac impression
2) Aortic impression
3) Esophageal impression
4) Caudal lobe

Question 8

Answer 8

Pericardial sac

Question 9

Answer 9

Sternopericardial ligament

Question 10

Answer 10

Ossa cordis

Question 11

Answer 11

1) great cardiac vein
2) Caudal cardiac vein
3) middle cardiac vein

Question 12

Label the branches of the aortic arch

Answer 12

1) Bicarotid trunk
2) Subclavian arteries
3) Brachiocephalic trunk

Question 13

Answer 13

1) External jugular vein
2) Bijugular trunk
3) Subclavian vein
4) Cranial vena cava

Question 14

The right azygous vein drains into what?

Answer 14

Cranial vena cava

Question 15

The left azygous vein drains into what?

Answer 15

Coronary sinus
Unique to cattle

Question 16

Answer 16

Left azygous vein

Question 17

What are the lymph nodes that make up the mediastinal lymphocenter?

Answer 17

Caudal mediastinal Lnn.
Particularly large between aorta and esophagus
Concha stressed this

Question 18

Lentil the lobes of the thymus in calf

Answer 18

1) Cervical lobe
2) Intermediate lobe
3) thoracic lobe

Question 19

Answer 19

Question 20

Answer 20

Question 21

Answer 21