Thorax Flashcards
(22 cards)
During inspiration the diaphragm ?
Descends… Compressing the abdominal viscera
During passive expiration…
The diaphragm, intercostal muscles, etc relax…decreasing intrathoracic volume and increasing intrathoracic pressure, expelling air from the lungs…the stretched elastic tissue of the lungs recoils, expelling most of the air
During expiration, the vertical diameters return to neutral position as the elastic recoil of the lungs produces …
Subatmospheric pressure in the pleural cavities, between the lungs and the thoracic wall.
Movement of the upper ribs at the costovertebral joints, about an axis passing through the neck of the ribs, causes the anterior ends of ribs and sternum, especially it’s inferior end, to rise…this is called?
Pump-handle movement
The increase in the transverse dimension of the thorax when the intercostal muscles are contracted is called ?
Bucket-handle movement
Most visible in the inferior costals, the lateral part.
Mammary glands are firmly attached to the dermis of the overlying skin by the…
Suspensory ligaments
These ligs are particularly well developed in the superior part of breast
Most lymph (>75% ), especially from the lateral quadrants of the breast, drains into
Axillary lymph
Lymph from medial breast quadrants drains to the …
Parasternal l.n.
Lymph from inferior boob quadrant may pass deeply to …
Abdominal lymph nodes
Anterior rami of t12 nerves, inferior to the twelfth ribs, form….
The subcostal nerves
Posterior intercostal and subcostal arteries derived from?
Thoracic aorta
Internal thoracic and supreme intercostal arteries derived from…
The subclavian artery
Superior and lateral thoracic arteries derived from..
Axillary artery
Internal thoracic artery divides into?
Superior epigastric and musculophrenic arteries
Thoracic cavity 3 compartments
Two pulmonary cavities, and one central mediastinum( contains heart, vessels, esophagus, thymus, trachea etc)
Pleural sac consists of two plaura…
Visceral- covers lungs and adherents to all its surfaces
Parietal pleura- lines the pulmonary cavities, adhering to the thoracic wall, the mediastinum, and the diaphragm
Pleural cavity
The potential space between the two pleura- contains serous pleural fluid
Parietal pleura consists of four parts
Costal, cervical, mediastinal, and diaphragmatic parts
Lungs function
Oxygenate blood by bringing inspired air into close relation with the venous blood ini the pulmonary capillaries
They are elastic and recoil to 1/3 of their size
The cardiac notch primarily indents the anteroinferior aspect of the _____ lobe of the left lung, creating a tongue like process called
Superior lobe…
Lingula
Three lobes? Two fissures? Three surfaces ? Three borders? Of lungs
Superior, middle, inferior lobes( right lung)
Transverse and oblique fissure(right lung)
Costal, mediastinal, and diaphragmatic surfaces
Anterior, inferior, and posterior borders
The root of the lung connects…
The lung with the heart and trachea
