The Appendicular Skeleton. THE SKELETAL SYSTEM The Appendicular Skeleton. 2 pairs of limbs and 2 girdles Pectoral (shoulder) girdle attaches upper limbs Pelvic (hip) girdle secures lower limbs 3-Segmented limbs Upper = arm Arm Forearm Hand Lower = leg Thigh Leg Foot.
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Radius is thinner proximally, like a spool of thread, and wide distally; ulna is slightly longer and looks like a monkey wrench (supposedly!)Forearm
In the anatomical position, the radius is lateral (thumb side); with pronation the palm faces posteriorly and the bones cross
Prone: body lying face down
Suppine: body lying face up
(you can remember prone if you think about how you would fall forward onto your face if you passed out)
pronation moves the forearm into the prone position and supination moves it back to the anatomical position
Right hand, 2 views:
(hip socket) which receives ball-shaped head of femur
true (lesser) pelvis