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SAQ 1 (a) Is your shoulder (i) superior or (ii) inferior to your hips? (b) Is your heel the (i) anterior or (ii) posterior part of your foot? (c) Is your hand the (i) distal or (ii) proximal part of your arm? (d) Is your big toe on the (i) medial or (ii) lateral side of your foot? (e) Is your thumb on the (i) medial or (ii) lateral side of your hand? (f) When crossing your legs, are you (i) adducting or (ii) abducting your hip? (g) Cross your elbows on a table, with your chin on your hands, and slide your elbow round in a circle on the table. Does your humerus (upper arm) (i) circumduct or (ii) rotate? (h) When kneeling, are you (i) flexing or (ii) extending your knee? (i) When standing on tiptoe, are you (i) flexing or (ii) extending your ankle? (j) From the anatomical position, bend your arms at the elbow by 90 degrees, and fold your arms across your body. Does your humerus (i) rotate or (ii) circumduct? SAQ Answers 3. THE SKELETAL SYSTEM The skeletal system consists of the bones, their joints and their associated tissues such as ligaments and cartilage. The major bones are shown in Figure 2. It supports the body and protects vital organs. It also provides joints and a framework for muscle attachment, thus playing a part in body movement. This section concentrates on the latter function. UPPER LIMB: SHOULDER GIRDLE UPPER ARM FOREARM WRIST HAND skull clavicle sternum rib LOWER LIMB: PELVIC GIRDLE THIGH LEG ANKLE FOOT scapula humerus innominate bone of pelvis vertebral column sacrum ulna coccyx radius carpals metacarpals phalanges femur patella tibia fibula tarsals metatarsals phalanges FIGURE 2. THE SKELETON. Unit 1 – Basic Anatomy 3