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b. Chondroblasts11. Contrast interstitial and appositional growthof the cartilage model..
12.Describe events during cartilage model formation. Includeeach of the following:a. nutrient arterypenetration –Nutrient artery penetrates thec. Contrast the perichondriumand the periosteum
13. Describe (step 2) growth of the cartilage model. Include eachof the following:When the perichondrium starts to form bone it is known asthe periosteum.14. Describe (step 3) bone collar and periosteum formation.