Stapes
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The stapes or stirrup is a bone in the middle ear of humans and other tetrapods which is involved in the conduction of sound vibrations to the inner ear. This bone is connected to the oval window by i
The size of the stapes, compared with a 10-cent euro coin.
The stapes, as first described by Giovanni Filippo Ingrassia (Labeled M, bottom right).
1871 Descent F937.1 fig 03
Incus
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The incus or anvil in the ear is one of three small bones in the middle ear. The incus receives vibrations from the malleus, to which it is connected laterally, and transmits these to the stapes media
Diagram showing synapsid jaw evolution from early "pelycosaur" synapsids to modern mammals, with the incus/quadrate labelled in purple
Tympanic cavity. Facial canal. Internal carotid artery.
Auditory ossicles. Tympanic cavity. Deep dissection.
Aditory ossicles. Incus and malleus. Deep dissection.