Wounds of the scalp bleed continuously

 # The wounds of the scalp bleed continuously because:
A. Scalp is highly vascular
B. Blood vessels lie just beneath the skin
C. Wounds gape
D. Vessel walls fail to retract

The correct answer is D. Vessel walls fail to retract.

The blood vessels of the scalp are embedded in the dense connective tissue (subcutaneous fibroadipose tissue) layer and their walls are adherent to its fibrous network. 
Therefore, when the vessels are torn in an open wound, they are unable to retract. This results in continuous bleeding. The scalp lacerations even when small, can produce death in unconscious patient, if bleeding is not controlled. 

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