Which one of the following statements is accurate for the Appendicular Skeleton?

Correct Answer: D

Rationale: The appendicular skeleton has 126 bones (upper/lower limbs, pectoral/pelvic girdles) at the body’s extremities. The axial skeleton has 80 bones centrally. '100' and '80 at extremities' are incorrect, making 'Consists of 126 bones which are located at the extremities of the body' accurate.

Correct Answer: B

Rationale: The wrist (radiocarpal joint) is a condyloid joint, allowing flexion, extension, abduction, and adduction. Pivot is rotation (e.g., neck), saddle is thumb, and gliding is sliding, making 'Condyloid' correct.

Correct Answer: C

Rationale: Osteocytes reside in lacunae, small spaces within the lamellae of osteons in compact bone, extending processes into canaliculi for nutrient exchange. Osteons are the units, canaliculi are channels, and lamellae are layers. Answer is C, per the document.

Correct Answer: D

Rationale: Sesamoid bones (e.g., patella) ossify within tendons, enhancing leverage. Sphenoid and ethmoid are cranial, hyoid is free-floating—none are in tendons. Answer is D, per the document.

Correct Answer: D

Rationale: Blood vessels in compact bone are in the central (Haversian) canal of osteons, supplying osteocytes via canaliculi. Canaliculi, periosteum, and lacunae don’t house vessels. Answer is D, per the document.