AIIMS 2019 Zoology Bone Tissue MCQ Question
Choose the correct option for the labelling in the given diagram (A, B, C, D)
Haversian canal, lacuna, Lamellae, Haversian system
Haversian canal, Volkmann's canal, Endosteum, Lamellae
Volkmanns canal, Lamellae, Osteocytes, Haversian canal
Haversian canal, Osteocytes, Lamellae, Endosteum
Correct Answer
Detailed Explanation
Option A is correct because it accurately identifies the components of the Haversian system in bone tissue: the Haversian canal (1), which contains blood vessels and nerves; lacunae (2), which house osteocytes; lamellae (3), the concentric rings of bone matrix; and the Haversian system (4), which is the structural unit of compact bone.
Other options are incorrect as they mislabel components or mix structures that do not belong together. For instance, option B incorrectly includes Volkmann's canal, which connects Haversian canals but is not part of the Haversian system itself. Option C misplaces the order of structures, and option D incorrectly identifies the endosteum, which is a membrane lining the medullary cavity rather than a component of the Haversian system. Understanding these structures is essential for grasping bone histology and physiology.
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