Thoracic Cavity

Question 1

“Point” of the Diaphragm

Answer 1

cupula, at approximately ICS 6

Question 2

Lumbar attachments of the diaphragm

Answer 2

crura (left and right)

Question 3

Aortic hiatus

Answer 3

opening in the diaphragm that allows the descending aorta, azygous vein, and the thoracic duct to pass through

Question 4

What organ sits right behind the diaphragm?

Answer 4

liver

Question 5

Caval foramen

Answer 5

hole in the musculotendinous plate of the diaphragm for the caudal vena cava to pass through

Question 6

Esophageal hiatus

Answer 6

hole in the musculotendinous plate of the diaphragm for the esophagus and vagal trunks to pass through

Question 7

Diaphragm blood supply

Answer 7

musculophrenic artery

Question 8

Diaphram Innervation

Answer 8

phrenic nerve

Question 9

spinal roots of the phrenic nerve

Answer 9

C5, C6, C7

Question 10

Viscera

Answer 10

organs

Question 11

3 Parietal Pleuras

Answer 11

1. Costal
2. Mediastinal
3. Diaphragmatic

Question 12

Visceral Pleura in the thoracic cavity?

Answer 12

Pulmonary pleura

Question 13

Cupula pleurae

Answer 13

where the costal and mediastinal pleura join cranially, and may extend in front of the first rib

Question 14

Plica venae cavae

Answer 14

fold in the pleura that contains the caudal vena cava, between diaphragm and pericardium

Question 15

3 Major Spaces of the Thoracic Cavity

Answer 15

Mediastinum
2 Pleural Cavities

Question 16

2 Major Spaces of the Abdominal Cavity

Answer 16

1. Peritoneal
2. Retroperitoneal

Question 17

Mediastinum

Answer 17

center cavity (that is often slightly to left of midline) that separtes the two pleural spaces in the thorax

Question 18

3 Sections of Mediastinum

Answer 18

1. Cranial
2. Middle
3. Caudal

Question 19

What is the only thing in the middle mediastinum?

Answer 19

heart

Question 20

Two Portions of Mediastinum

Answer 20

1. Dorsal (above trachea)
2. Ventral (below trachea)

Question 21

2 Ligaments that secure the heart

Answer 21

1. Sternopericardial
2. Phrenicopericardial

Question 22

What part of the mediastinum are the two ligaments that secure the heart located?

Answer 22

ventral portion

Question 23

What species has a thick mediastinum?

Answer 23

ruminants

Question 24

Clinical significance of a thick mediastinum?

Answer 24

Thicker = does not rupture as easily, can sometimes have only one collapsed lung instead of both

Question 25

Which species has the thinnest mediastinum?

Answer 25

horses

Question 26

Pleuritis

Answer 26

inflammation of the pleura (single layer of mesothelial cells) in the thorax

Question 27

Peritonitis

Answer 27

inflammation of mesothelial cells in the abdomen

Question 28

pericarditis

Answer 28

infammation of the single layer of mesothelial cells around the heart