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Question 1

Cortical bone (compact) accounts for what percentage of total bone mass?

Answer 1

0.8

Question 2

Trabecular bone (cancellous or spongy bone) accounts for what percentage of total bone mass?

Answer 2

0.2

Question 3

In long bones what are the epiphyses and metaphysis composed of?

Answer 3

Trabecular bone covered by a thin layer of cortical bone

Question 4

What is the composition of the diaphysis in long bones?

Answer 4

Almost totally cortical bone with a thin region of trabecular bone on the inner surface around the marrow cavity

Question 5

What is the structure of short bones like those in the wrist?

Answer 5

They have cores of trabecular bone surrounded by cortical bone

Question 6

What is the structure of flat bones that form the calvaria (skullcap)?

Answer 6

Two layers of cortical bone separated by a thicker layer of trabecular bone

Question 7

What are the two ways of organization in lamellar bone?

Answer 7

The lamellae are organized as parallel sheets or concentrically around a central canaI