6. The pectoral girdle A. Are the 3 bones that frame the shoulder B. Attached posteriorly to the thoracic vertebrae C. Consists of the scapula and the clavicle only D. A and B are correct E. A, B, and C, are correct 7. Long bones of the upper limbs develop from A. Compact bone B. Spongy bone C. Fibrous connective tissue D. Cartilage 8. Which of the following is a component of the osteon A. A central canal that carries blood vessels B. Concentric lamella C. Osteocytes in lacunae D. Canaliculi that connect lacunae to the central canal E. All are components of the osteon 9. The epiphyseal line is_____bone under the _____where the _____is located. A. Compact, epiphysis, growth plate B. Compact, epiphysis, suture line C. Spongy, diaphysis, canaliculi D. Spongy, diaphysis, haversian canal E. All are correct 10. Generally the medullary layer in the inner cavity, which usually contains A. Bone marrow B. Yellow marrow C. Only epithelial tissue D. Only osteocytes E. None are correct