Ch. 8 Flashcards
purpose of pectoral girdle
attaches upper limbs to trunk
purpose of pelvic girdle
attaches lower limbs to trunk
what structures comprise the pectoral girdle
clavicle and scapula
which is the only structure that articulates wit the axial skeleton
only the clavicle
the socket of the shoulder joint (glenoid cavity) is shallow and is good for what purpose?
good for flexibility, bad for stability
what are the 3 main functions of the clavicles
provide attachment for muscles, hold scapulae and arm laterally, transmit compression forces from upper limbs to axial skeleton
what section of the ribs is the scapulae located
between ribs 2-7
how many bones make up each upper limb
30
what region of the upper limb is the arm
between shoulder and elbow
what is the only bone of the arm
humerus
what bones does the humerus articulate with
scapula at the shoulder, radius and ulna at the elbow
what bones make up the forearm
radius and ulna
what does the proximal and distal ends of the radius and ulna articulate with
proximal ends articulate w/ humerus, distal ends articulate with carpals, as well as each other
at what point does the radius and ulna articulate with each other
proximal and distal radioulnar joints
24
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