Concept explainers
Figure 38.19 Which of the following statements about bone tissue is false?
- Compact bone tissue is made of cylindrical osteons that are aligned such that they travel the length of the bone.
Introduction:
Bones are considered as organs due to the presence of different kind of tissues like blood, connective tissue, nerves, and bone tissue. The bone tissue is categorized into two types namely compact and spongy.
Answer to Problem 1VCQ
Correct answer:
The correct answer is option (b) Haversian canals contain blood vessels only.
Explanation of Solution
Explanation/justification for the correct answer:
Option (b) Haversian canals contain blood vessels only. Haversian canals or osteogenic canal is not only composed of blood vessels. It is made up of both nerve cells and blood vessels. So, the correct answer is option (b).
Explanation for incorrect answer:
Option (a) Compact bone or cortical bone develops the hard outer layer of all bones and encloses the medullary cavity or bone marrow. This tissue contains units like osteons or Haversian systems. Osteons consists of a mineral matrix and are cylindrical in structure, lined up parallel to the long axis of the bone. So, this is an incorrect option.
Option (c) Haversian canals contain blood vessels and nerve fibers. Each osteon contains lamellae, layers of the compact matrix that enclose a central canal known as the Haversian canal. The Haversian canal or osteogenic canal consists of blood vessels of bone and nerve fibers. So, this is an incorrect answer.
Option (d) Spongy tissue is found on the interior of the bone, and compact bone tissue is found on the exterior. Spongy bone or cancellous bone develops the internal layer of all bones, dissimilar to compact or cortical bones that develop the outer layer. So, this is an incorrect answer.
The statement Haversian canals contain blood vessels only is false. Hence, the correct answer is option (b) Haversian canals contain blood vessels only.
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Chapter 38 Solutions
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