The summary provides the high level information from the document in 3 sentences: The document contains 20 multiple choice questions about the anatomy of the thorax, including questions about lung lobes, intercostal nerves, branches of the aorta, parts of the heart, and structures in the mediastinum. The questions cover topics such as the anatomy of the thoracic vertebrae, muscles of inspiration, joints of the thoracic cage, and vasculature of the lungs and heart. The document is a quiz that tests knowledge of the key anatomical structures and their relationships within the thoracic cavity.

1. MCQ of THORAX for practice……………..
Dr. Ashfaq.
1. The right lung- 6. Relation of base of left lung are-
a Is larger than the left a fundus of the stomach
b Is divided by fissures into the upper and lower b right lobe of the liver
lobes and the lingula
c Possesses 10 BPSs c spleen
d Is less prone to infection d left kidney
e Is related inferiorly to the liver e left suprarenal gland
2. Intercostal nerves- 7. Intercellular junctions within intercalated discs
are-
a are ventral ramus of thoracic spinal nerve a zonula occludentes
b are 12 pairs in number b fascia adherentes
c are purely motor nerves c macula adherentes
d lie below intercostal vessels d gap junctions
e carry GVE fibers e tight junctions
3. The thymus- 8. Aortic opening of the diaphragm transmits-
a develops from 2nd pharyngeal pouch a arch of the aorta
b contains Hassal’s corpuscle b right phrenic nerve
c is a central lymphoid organ c azygos vein
d produces B lymphocyte d vagus nerve
e secretes some hormone e thoracic duct
4. Branches of arch of the aorta are- 9. Respiratory unit includes-
a coronary arteries a segmental bronchus
b brachiocephalic trunk b respiratory bronchiole
c left subclavian artery c terminal bronchiole
d right common carotid artery d alveolar sacs
e pulmonary trunk e alveoli
5. Sternum- 10. Fibrous pericardium-
a is a flat bone a is also called epicardium
b is a membranous bone b is intimately blended with central tendon of
the diaphragm
c forms anterior boundary of the mediastinum c develops from splanchnopleuric layer of
d contains red marrow throughout life lateral plate mesoderm
e is formed by fusion of 5 sternebrae d is supplied by autonomic nerves
e is pain sensitive

2. 11. The thoracic trachea- 16. Nonkeratinized stratified squamous epithelium
is found in-
a Bifurcates at the level of the sternal angle a tongue
b Is closely related to the esophagus b esophagus
c Has complete fibrocartilaginous rings within c thoracic duct
its walls d skin
d Is related anteriorly to the thyroid gland e stomach
e Ends at the level of the sternal angle
12. Contents of the middle mediastinum are- 17. Gaseous exchange occurs in-
a thymus a trachea
b trachea b primary bronchus
c heart c lobar bronchus
d thoracic duct d alveolar sacs
e ascending aorta e alveoli
13. A typical thoracic vertebra has- 18. Parts of the parietal pleura are-
a heart shaped body a costal pleura
b demifacet on body b mediastinal pleura
c foramen transversarium c visceral pleura
d mammilary process d pulmonary pleura
e short, slender transverse process e diaphragmatic pleura
14. Fate of the fertilization include- 19. Branches of the internal thoracic artery are-
a determination of chromosomal sex a superior phrenic artery
b restoration of haploid number of chromosome b superior epigastric artery
c initiation of cleavage c posterior intercostal artery
d formation of blastocyst d musculophrenic artery
e formation of morula e pericardiophrenic artery
14. Coronary arteries are- 19. Azygos vein-
a the very first branches of arterial system a receives blood from bronchial veins
b vasa vasorum b is paired
c elastic arteries c join superior & inferior vena cava
d connected to each other by actual anastomosis d enters thoracic cavity through aortic opening
e functional end arteries e drains into inferior vena cava
1. The adult heart- 6. The right ventricle-
a Is related posteriorly to the esophagus, left a Forms most of the inferior surface of the
main bronchus and aorta heart
b Lies on the left dome of the diaphragm b Is normally oval in cross section
c In health weighs approximately 900 gm c Has a tricuspid valve in its inflow part
d Admits the great veins on its posterior surface d Usually contains three conical papillary
e Is totally enclosed by the serous pericardium muscles
e Possesses a pulmonary orifice guarded by a
tricuspid valve

3. 2. The mitral valve- 7. The ascending aorta-
a Possesses two cusps a Ascends as far as the right sternoclavicular
b Guards the right atrioventricular orifice joint
b Lies intrapericardially
c Is closely related to the aortic valve c Has no branches
d Has no papillary muscle attachments d Is related posteriorly to the right main
e Lies on the posterior wall of the left ventricle bronchus
e Is related anteriorly to the sternum
3. The thoracic duct- 8. The lung tissue-
a Arises in the thorax a Receives its oxygenated arterial supply via
b Ascends anterior to the vertebral column branches of the thoracic aorta
b Has venous drainage into the azygos system
of veins
c Drains into the left brachicephaliv vein c Has no lymph drainage
d Drains mainly thoracic structures d Has ciliated columnar epithelial lining
e Is joined by the right lymphatic duct throughout
e Receives a nerve supply from the vagus
5. The thoracic esophagus- 10. The pulmonary trunk-
a Lies posterior to the trachea a Lies at its origin to the root of the aorta
b Is directly related to the vertebral column b Is connected to within a common sleeve of
throughout its course serous pericardium with the ascending aorta
c Is related to the left atrium c Bifurcates anterior to the aortic arch
d Pierces the central tendon of the diaphragm at d Is related to the left pleura and lung
the level of the 8th thoracic vertebra e Is closely related to both right and left
e Is crossed by the left bronchus coronary arteries
3. First thoracic vertebra/’s- 8. Primary cartilaginous joints are-
a is typical a sternoclavicular
b presents two demifacets on body b costovertebral
c vertebral foramen is small c first sternocostal
d superior vertebral notch is prominent d xiphisternal
e spinous process is directed horizontally e costochondral
4. Muscle(s) of inspiration include(s)- 9. Azygos vein-
a External intercostal a ends into inferior vena cava
b Pectoralis major b is a part of portal circulation
c The diaphragm c has no valve
d Serratus anterior d connects superior & inferior vena cava
e Internal intercostal of same side e passes through vena caval opening of
diaphragm