Question at position 34 Perforating canals run parallel to the surface of bone and are responsible for carrying blood vessels deep into the bone.TrueFalse

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Question at position 34: Perforating canals run parallel to the surface of bone and are responsible for carrying blood vessels deep into the bone. True/False

Option 1: True. This statement is not accurate. Perforating canals (aka Volkman’s canals) actually run perpendicular or at right angles to the surface of the bone, connecting the Haversian (central) canals, and they help deliver blood vessels and nutrients from the periosteum into the bone matrix. Therefore saying they run parallel to the surface is incorrect.

Option 2: False. This option aligns with anatomical facts. Perforating canals do not run parallel to the bone surface; they traverse the bone to connect the periosteal vessels with the endosteal/central canals, enabling vascular communication deep into the bone. This makes the stated role correct in principle while the orientation described (parallel to the surface) is what makes the claim false.

To explore the conceptual implications: understanding the orientation of perforating canals is key to grasping how bone vasculature is organized. The parallel-orientation claim would imply a superficial, tangential pathway, which would not efficiently connect surface vessels with the inner marrow cavity. The actual perpendicular arrangement provides the correct route for vessels to travel from the periosteum into the deeper lamellar bone and Haversian systems, supporting nutrient and waste exchange throughout the cortical bone.

In summary, the statement in Option 1 misrepresents the anatomical direction of perforating canals, while Option 2 correctly identifies that the parallel orientation is false and that these canals serve to carry vessels into the bone, though the textual reasoning emphasizes the orientation being perpendicular rather than parallel.

Question at position 34 Perforating canals run parallel to the surface of bone and are responsible for carrying blood vessels deep into the bone.TrueFalse

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