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25 Cards in this Set
- Front
- Back
Thoracic Cage • Composed of |
– Thoracic vertebrae posteriorly – Sternum and costal cartilages anteriorly – Ribs laterally |
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Thoracic Cage functions |
– Protects vital organs of thoracic cavity – Supports shoulder girdles and upper limbs – Provides attachment sites for muscles of neck, back, chest, and shoulders |
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Ribs 1-7 |
True Ribs |
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Ribs 8-12 |
False ribs |
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Floating ribs |
#11 and 12 |
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Ribs: True(1-7), False(9-12), Floating(11-12) Jugular notch Clavicular notch Manubrium Sternal angle Body Xiphisternal joint Xiphoid Sternum Intercostal spaces Costal cartilage Costal margin
process |
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components of sternum |
-Manubrium -Sternal Angle -xiphesternal joint -Xiphoid process |
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–Pectoral girdle function |
• Attaches upper limbs to body trunk |
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Pelvic girdle |
• Attaches lower limbs to body trunk, designed to be weight bearing |
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Pectoral girdle consists of: |
1 clavicle & 1 scapula |
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Clavicles and scapulae functions and characteristics |
– Attach upper limbs to axial skeleton – Provide attachment sites for muscles that move upper limbs – allows for maximum movement, but reduces stability, maximum mobility not seen anywhere else |
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Sternoclavicular joints |
: only attachment points of the pectoral girdle to the axial skeleton |
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Clavicle function |
(collarbone): act as braces to hold the scapula and arms out laterally |
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Scapula: articulates with |
clavicles & with humerus bones of upper arm – Scapulae (pl.) or shoulder blades |
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The Upper Limb • 30 bones |
= skeletal framework of upper limb – Arm • Humerus – Forearm • Radius and ulna – Hand • 8 carpal bones in the wrist • 5 metacarpal bones in the palm • 14 phalanges in the fingers |
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Ulna |
– Medial bone in forearm – Forms major portion of elbow joint with humerus |
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Radius |
– Lateral bone in forearm – Head articulates with capitulum of humerus and radial notch of ulna
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Connects radius and ulna |
Interosseous membrane connects radius and ulna along their entire length |
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Carpus (Wrist) |
– Eight bones in two rows |
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Proximal row of carpus—lateral to medial |
– Scaphoid, lunate, triquetrum, and pisiform |
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Distal row of carpus—lateral to medial |
– Trapezium, trapezoid, capitate, and hamate |
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Form wrist joint: |
Only scaphoid, lunate, and triquetrum form wrist joint which radius is involved more than ulna |
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Elbow joint |
Ulna is major player in the formation of the elbow joint |
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Metacarpus (Palm) |
– Five metacarpal bones (#1 to #5 from thumb to little finger) form the palm |
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Phalanges (Fingers) |
– Fingers numbered 1–starting at thumb (pollex) – Digit #1 (Pollex) has 2 bones - no middle phalanx – Digits #2 – 5 have 3 bones—distal, middle, and proximal phalanx |