Thorax Lecture Flashcards
Thoracic inlet
Bounded bilaterally by first pair of ribs and their costal cartilages. The first thoracic vertebra and paired longus colli muscles bound the thoracic inlet dorsally while the manubrium bounds it ventrally
Structures that pass through the aortic hiatus
Aorta, azygous vein, thoracic duct
Structures that pass through the esophageal hiatus
Esophagus and vagal trunks (dorsal and ventral)
Structures that pass through the caval foramen
Caudal vena cava
Serous membranes composition and purpose
Mesothelium:simple squamous epithelium and thin CT layer. Epithelial cells produce serous fluid which helps reduce friction and has protective functions.
Parietal serous membrane
Relating to the wall of a cavity
Visceral serous membrane
Relating to an interior organ in the large cavity
Types of parietal pleura asked to ID
Costal parietal pleura (internal interocostal ribs surface)
Mediastinal pariteal pleura (in mediastinum)
Diaphragmatic parietal pleura (on diaphragm)
Visceral pleura to ID
Pulmonary visceral pleura
Components of mediastinum
- Right and left mediastinal parietal pleurae and contents between them
- Heart, trachea, thymus, lymph nodes, great vessels
Plica venae cavae
Pleura around caudal vena cava
Pulmonary ligament
On caudal portion of lung lobe. Connects to the mediastinum at the esophagus level.
T/F There is more liquid delivered to the tissues in arterial blood than liquid returned from the tissues in veins
True…the difference becomes interstitial fluid.
Interstitial fluid movement
Passes through lymph nodes and picked up in lymph capillaries and returned to venous system in lymph vessels.
Chyle
Milky fluid that contains fat in the form of chylomicrons. Sometimes found in lymph from intestines.
