[Anatomy] The Thorax quizzes – Part 2 (20 questions)

The superior and inferior bronchopulmonary segments of the superior lobe of the left lung combine to form the lingula

The breast is supplied by the internal thoracic, lateral thoracic, thoracoacromial, and posterior intercostal arteries

The sternoclavicular joint is a saddle-type synovial joint

The musculophrenic artery gives rise to anterior intercostal arteries for intercostal spaces 7–9

The mammary glands are modified sweat glands

The serratus posterior inferior depresses the ribs

The coronary sinus receives the great and small cardiac veins, middle cardiac vein, left posterior ventricular vein, and left marginal vein. The anterior cardiac veins begin over the anterior surface of the right ventricle and cross over the coronary groove to end directly in the right atrium

Thoracic vertebrae have costal facets or demifacets on their bodies, costal facets on the transverse processes (for the first 9 or 10 thoracic vertebrae), and long spinous processes

The musculophrenic artery gives rise to anterior intercostal arteries for intercostal spaces 7–9

While a person is supine, the arch of the aorta lies superior to the transverse thoracic plane

The SA node is located anterolaterally just deep to the epicardium at the junction of the SVC and right atrium, near the superior end of the sulcus terminalis. The SA node, a small collection of nodal tissue and specialized cardiac muscle fibers, is the pacemaker of the heart. The SA node is supplied by a branch of the right coronary artery in about 60% of individuals

The interior of the left atrium has a largewalled part and a smaller muscular auricle containing pectinate muscles

The levatores costarum are innervated by the dorsal primary rami of C8–T11

The chest consists of 12 pairs of ribs, the sternum, costal cartilages, and 12 thoracic vertebrae

Visceral afferent fibers are distributed to bronchial mucosa, bronchial muscles, interalveolar connective tissue, and pulmonary arteries and veins

The diaphragm receives somatic efferent and afferent innervation—not sympathetic innervation

Anterior and posterior intercostal arteries pass between the internal and innermost intercostal muscles

The interior of the left ventricle includes anterior and posterior papillary muscles

The intercostobrachial nerve communicates with the medial brachial cutaneous nerve

Chest pain may result from cardiac disease, pulmonary disease, intestinal problems, gallbladder disorders, and musculoskeletal disorders

The fibrous pericardium is attached to the posterior surface of the sternum by the sternopericardial ligaments