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Cards In This Set
| Front | Back |
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What shape is the thorax and what is it formed by?
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the thorax is an irregular cylinder shaped structure and is formed by bony & muscular components
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Describe the inlet and outlet of the thorax
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The circumference of the superior aperture forms the inlet which is widely open the outlet is formed by the inferior aperture and is completely sealed by the diaphragm
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Describe the space enclosed by the thorax
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 the space enclosed by the thorax can be subdivided into three components: the mediastinum and the two pleural cavitiesthe mediastinum holds the heart, bottom of trachea, and the esophagus. the two pleural cavities hold the lungs |
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In general, what are the ribs/costae?
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ribs are flat bones on either side of the lateral wall of the thoraxa typical rib is comprised of a head, neck, angle, and shaft (body).
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What are true ribs? false ribs?
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Describe how ribs articulate with vertebrae
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ribs articulate with & in between the level of vertebra that is one LEVEL superior than (not one number higher), and at the same level as the level of the ribsthis means, for example, the heads of the ribs at level T5 will articulate with the vertebral facets of T4 (one level higher) and T5
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Which part of the rib is attached to the sternum?
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the anterior end of the shaft is connected to the sternum by costal cartilage
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Which part of the rib is joined with the thoracic vertebrae and what kind of joint is it?
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the head and tubercle form synovial joints with facets of the thoracic vertebrae
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What is the sternum?
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the sternum is a flatbone on the anterior part of the body which consists of the manubrium(handle), shaft (body), and xiphoid process
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What is the manubrium and what does it articulate with?
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the manubrium articulates with the medial end of the clavicle and the first 2 ribsit also joins to the body of the sternum at the manubriosternal joint
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Which ribs articulate with the shaft of the sternum?
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the shaft of the sternum articulates with ribs 2-9 through costal cartilages
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What does the xiphoid process articulate with?
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the xiphoid process articulates with the shaft of the sternum at the xiphisternal joint
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What comprises the pectoral muscles?
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1) pectoralis major 2) pectoralis minor
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What are the origins, insertions, innervations, and functions of the pectoralis major?
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pectoralis major:origin: clavicle, sternum, and costal cartilages 1-6insertion: intertubercular groove of humerus (lateral lip)innervation: pectoral nerve (brachial plexus)functions: adduction and medial rotation of shoulder joint
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What are the origins, insertions, innervations, and functions of the pectoralis minor?
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pectoralis minor:origin: ribs 3-5insertions: coracoid process of scapulainnervations: pectoral nerve (brachial plexus)functions: pulls shoulder down and forward
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