davissharneiceUnit2Chapter7muscle (1).docx - Unit 3 Homework 1 chapter 7 The Skeletal System Davis Sharneice 1 Describe an osteocyte Osteocytes are

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Unit 3 Homework 1 chapter 7: The Skeletal System Davis, Sharneice 1. Describe an osteocyte. Osteocytes are mature bone cells, they stay in chambers call lacunae. Exchange nutrients and wastes via cell processes within tiny passageways 2. When speaking about long bones: a. What is the diaphysis? Bone shaft b. What is the epiphysis? Expanded end 3. Contrast a compact (dense) bone and a Spongy (trabecular) bone. Compact bone is on the wall of diaphysis, consists of cylindrical units called osteons, strong and solid, resists compression Spongy bone makes up epiphyses, consists of branching plates called trabeculae, somewhat flexible, spaces between trabeculae that reduce the bones weight 4. Describe where one would find each type (compact and spongy) in the skeleton. Compact would be found in the bone shaft Spongy is found in the top extended end 5. Name what is located in the hollow shaft of long bones. Periosteum Yellow marrow Medullary cavity Compact bone Endosteum 6. Complete the following table. List the Three Cell Types in Bone Tissue List Each Cell Type’s Function 1. Osteoclast Break down calcified matrix 2. osteoblast
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