Bony Thorax, Sternum, and Ribs
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| What is the main function of the bony thorax? | serve as an expandable, bellowslike chamber, wherein the interior capacity expands and contracts during inspiration and expiration.
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| What does the bony thorax consist of? | Sternum, Thoracic Vertebra, and the 12 pairs of ribs.
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| Is the Sternum projected Aneriorly or Posteriorly? | Anteriorly
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| Is the Thoracic vertebra projected Anteriorly or Posteriorly? | Posteriorly
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| Where is the most common site for a bone marrow biopsy? | Sternum
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| An AP or PA projection of the sternum demonstrates the thoracic spine minimally. True/Fasle | Fales: it projects the sternum minimally.
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| What are the three segments of the sternum? | Manubrium (upper portion), Body (middle portion), and Xiphoid Process (most inferior)
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| What is the length of the Manubrium? | 2in. (5cm)
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| What is the length of the Body? | 4in. (10cm)
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| The four segments of the Body beings during puberty and is not completed until what age? | 25
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| What is the Xiphoid Process composed of and when does it totally ossify? | cartilage; 40yrs.
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| Whats another name for the palpable jugular notch? | suprasternal or manubrial notch
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| The Jugular Notch is at what level? | T2-T3
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| What is the Sternal Angle? | where the lower end of the manubrium joins the body of the sternum.
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| The Sternal Angle is an easily palpated landmark that can be used to locate other structures of the bony thorax. True/False | True
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| What is the level of the Sternal Angle?q | T4-T5
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| What is the level of the Xiphoid Process? | T9-T10
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| Where is the level for the Inferior Rib (costal) angle? | L2-L3
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| What is the Sternoclavicular Joint? | where each clavicle articulates with the manubrium laterally at the clavicular notch on eatch side.
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| What is the only bony connection between each shoulder girdle and the bony thorax? | Sternoclavicular Joint.
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| What connects directly to the sternum? | clavicles and the cartilages of the first seven pairs of ribs
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| The anterior ribs untire directly with the sternum. True/False | False: they unite to the sternum via a short piece of cartilage called costocartilage
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| What is Costocartilage? | the short piece of cartilage that attaches the ribs to the sternum.
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| Where does the first costocartilage connect to? | manubrium
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| Where does the second costocartilage connect to? | sternum at the level of the sternal angle
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| Where do the third through the seventh costocartilages connect directly to? | body of the sternum
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| Which ribs posses costocartilage but are connected at the 7th costocartilage, which then connects to the sternum? | 8,9,10
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| Which ribs are considered false ribs? | last five pairs of ribs (8,9,10,11,12)
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| Whats another name for the posterior end of a rib? | vertebral end
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| Whats another name for the anterior end of a rib? | sternal end
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| What does the Head of the rib articulate with? | one or two thoracic vertebral bodies as well as the neck of the rib
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| What does the Tubercle of the rib articulate with? | the transverse process of of a vertebra and allows for attachment of a ligament
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| What is the Costal Groove? | contains blood vessels and nerves
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| The vertebral end of a typical rib is 3-5in higher than ghe anterior/sternal end. True/False | True
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| What does the lower inside margin of each rib protect? | an artery, a vein, and a nerve
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| Where is the bony thorax its widest (in diameter)? | lateral margins of the 8th or 9th ribs
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