A structure that reduces the weight of the skull and drains into the middle ear would be

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Quizplus · Accepted Answer

A sinus is a structure that is present in many bones of the skull and reduces their weight. The maxillary sinus, for example, is located in the maxilla bone and drains into the middle ear through the nasolacrimal duct. Fontanels are soft spots present in the skull of infants where the bones have not yet fused. Diaphysis is the shaft of a long bone that contains yellow bone marrow. Red bone marrow is present in the spongy bone, not in structures that drain into the middle ear.

A Structure That Reduces the Weight of the Skull and Drains