アブミ骨（ あぶみこつ、英：stapes ）
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The stapes or stirrup is a bone in the middle ear of humans and other animals which is involved in the conduction of sound vibrations to the inner ear. This bone is connected to the oval window by its annular ligament, which allows the footplate to transmit sound energy through the oval window into the inner ear. The stapes is the smallest and lightest bone in the human body, and is so-called because of its resemblance to a stirrup (Latin: Stapes).
【 語 句 】
・middle ear：中耳 ・conduction：伝導 ・inner ear：内耳 ・oval window：前庭窓 ・annular ligament：輪状靭帯 ・resemblance：類似
【Structure】
The stapes is the third bone of the three ossicles in the middle ear and the smallest in the human body. It measures roughly 2 to 3 mm, greater along the head-base span. It rests on the oval window, to which it is connected by an annular ligament and articulates with the incus, or anvil through the incudostapedial joint. They are connected by anterior and posterior limbs (Latin: crura).: 862
【 語 句 】
・ossicle：小骨 ・anvil：キヌタ骨 ・incudostapedial joint：キヌタ-アブミ関節
