Question How many ribs do humans normally have? A.12 B.24 C.16 D.Varies from human to human E.Adam is missing one
Ribs Bony thorax (anterior view)Bony thorax Bony thorax (posterior view)Bony thorax 12 pair of ribs: –True Ribs – ribs 1-7; these are attached directly to the sternum through their own costal cartilages. –False Ribs – ribs 8-10; their costal cartilages are joined to the rib just above them so their attachment to the sternum is indirect –Floating Ribs – ribs 11-12; these ribs attach to vertebrae, but not to the sternum so they float on one end
Rib Cage During Respiration Dr. Michael Parker Demo Dr. Michael Parker Demo2 Dr. Michael Parker Demo3 Rib
Question Term that means breastbone? A.Corpus B.Xiphoid C.Sternum D.Clavicle
Sternum Sternum (breastbone)Sternum –Manubrium - handle –Corpus - body –Xiphoid - sword Rib and clavicular articulationsclavicular articulations
Trachea and Bronchi Trachea –Trachea Bronchi –Bronchi Alveoli --Alveoli O2 and Co2 are exchanged at the alveoli. There are about 300 million alveoli which are encapsulated in capillaries. The surface of the alveolus is composed of a thin layer of squamous epithelial cells with cuboidal cellsinterspersed among them.
Muscles of Inspiration Diaphragm External intercostal Internal intercostal Levator costarum Serratus posterior superior Sternocleidomastoid Scalenus Trapezius Pectoralis major Pectoralis minor Serratus anterior Subclavius Levator scapulae Rhomboideus major Rhomboideus minor
Diaphragm Dome shaped muscle innervated by two phrenic nerves. When diaphragm contracts during normal breathing, the dome descends l-2 cm and as much as l0 cm during deep inspiration.