Lecture 30 - Ungulate LRT 2 Flashcards
what are the boundaries of the thoracic inlet?
T1
1st rib and costal cartilage
manubrium
what are the boundaries of the thoracic outlet?
last [thoracic] vertebra
last pair of ribs and costal arch
xiphoid
diaphragm
what structures pass through the thoracic inlet?
- trachea
- esophagus
- common carotid
- subclavian a.
- recurrent laryngeal n.
- vagosympathetic trunk
- phrenic n.
- tracheal trunk
what structures pass through the thoracic outlet?
- descending aorta
- thoracic duct
- esophagus
- vagal trunks
- caudal vena cava
what are the boundaries of lung auscultation
- caudal margin of triceps
- lateral margin of epaxial m.
- basal border of lung
describe the ruminant thoracic cavity
- deeper and relatively short
- sloped more steeply
describe the horse’s thoracic cavity
- large
- diaphragm sloped more caudally
what allows the aorta, thoracic duct, and azygous v. to pass through the diaphragm
aortic hiatus
what allows the caudal vena cava to pass through the diaphragm
caval foramen
what passes through the right crus
- esophagus
- vagal trunks
what are the visceral pleura
- pulmonary visceral pleura
what are the parietal pleura
- mediastinal parietal pleura
- mediastinal pericardial parietal pleura
- diaphragmatic parietal pleura
- costal parietal pleura
what are the connecting pleura
- plica vena cava
- pulmonary l.
What is the line of pleural reflection?
Site where costal parietal pleura reflects off the ribs onto diaphragm to become diaphragmatic parietal pleura
T/F: the LOPR in the cow ascends abruptly from the 8th ccj to the dorsal 13th
TRUE
T/F: the LOPR in the horse ascends abruptly from the 8th ccj to the 18tg rib
FALSE - long sweeping curve
What is the tracheal bronchus? What species is it present in?
Supplies right cranial lung lobe branching off trachea before bifurcation
Pigs, ruminants
Describe the morphology of horse lungs
- Lacking interlobular fissures and intralobular lobulation
- no middle lobe present
- cardiac notch separates cranial and caudal lobes
Describe the morphology of the cow lung
- distinct interlobar fissures and intralobar lobulation
- tracheal bronchus
Describe the morphology of pig lungs
- distinct interlobar fissures and intralobar lobulation
- tracheal bronchus
Which of the following statements is correct?
A) The first rib forms a boundary of the thoracic outlet.
B) A penetrating wound adjacent the 11th CCJ in the ox may enter the abdomen.
C) The horse has a middle lung lobe in the left lung.
D) The pig lacks a tracheal bronchus.
B) A penetrating wound adjacent the 11th CCJ in the ox may enter the abdomen
