134 UNIT 8 Introduction to the Skeletal System Activity 3: Examining the Gross A

Question

134 UNIT 8 Introduction to the Skeletal System Activity 3: Examining the Gross Anatomy of a Long Bone . What is the function of the periosteum? 2. The endosteum lines the: a. outside of the diaphysis b. outside of the epiphysis. c. medullary cavity d. trabeculae. e. medullary cavity and the trabeculae. 3. Yellow marrow is found in the: a. spongy bone of the epiphysis. b. epiphyseal plate. c. medullary cavity of the epiphysis. d. medullary cavity of the diaphysis. Activity 4: Exploring the Microscopic Anatomy of Compact Bone-The Osteon 1. Identify the parts of an osteon in the accompanying photomicrograph a. b. d. LM (400x) b c Which of the following structures routes blood from the periosteum to the central canal of each osteon? a. canaliculi b. endosteum 2. c. osteocytes d. perforating canals How do osteocytes obtain oxygen through the hardened minerals of osteon? a. They don't; oxygen diffuses through the canaliculi. b. They don't because mature osteocytes don't need oxygen. c. Perforating canals that connect to each osteocyte bring nutrients and gases to the osteocytes. d. The minerals are spaced such that gases can diffuse through the bone. 3. 4. Differentiate between a lacuna and a canaliculus 5. Distinguish between interstitial lamellae and concentric lamellae.

Explanation / Answer

1) Function of peristoneum is to serve as a channel for the blood supply and nutrient supply for bone tissue. It is the thin membrane that covers many of the bones in our body.

2) The endosteum lines the medullary cavity

3) Spongy bones of the epiphysis is the correct answer.

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