Chapter_8 - KIN 216 Applied Human Anatomy Chapter 8 Slides...

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KIN 216 Applied Human Anatomy Chapter 8 Slides adapted from Dr Pfeiffer
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Appendicular Skeleton Limb bones and girdles Pectoral girdle: attaches upper limbs to trunk Pelvic girdle: attaches lower limbs to trunk Attached to axial skeleton Each limb is composed of 3 basic segments: Upper Limb: Arm, forearm, hand Lower Limb: Thigh, leg, foot
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Pectoral Girdle Clavicle and scapula (pair; shoulders) Attaches upper limb to trunk and provides muscle attachments Allows mobility Only the clavicle attaches to the axial skeleton; allowing the scapula to move freely Shallow socket (glenoid cavity) at shoulder joint – good for flexibility, bad for stability
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Pectoral Girdle Clavicle (collarbone) S-shaped, horizontally oriented, anterior Sternal end attaches to manubrium; acromial end attaches to scapula Provide muscle attachments, act as braces for arms, and transmit force from upper arms to axial skeleton
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Pectoral Girdle Scapulae (shoulder blades) Triangle-shaped, dorsal side of rib cage, between ribs 2-7 Each has 3 borders: superior, medial, lateral Each has 3 angles: superior, inferior, lateral Acromion = “apex of shoulder” – articulates with acromial end of clavicle
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Upper Limb 30 bones each side (60 total) 1 Humerus 1 Radius and 1 Ulna 8 Carpals 5 Metacarpals 14 Phalanges
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Arm (Brachium) Humerus (largest and longest bone)
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Chapter_8 - KIN 216 Applied Human Anatomy Chapter 8 Slides...

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