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The organ of hearing.

Ear

The organ of hearing.

"Across the middle ear a chain of three small bones stretches from the tympanic membrane to the inner ear. These bones are called from their shape the <em>malleus</em> (hammer), the <em>incus</em> (anvil), and the <em>stapes</em> (stirrup)." — Ritchie, 1918

Bones of the Ear

"Across the middle ear a chain of three small bones stretches from the tympanic membrane to the inner…

An illustration of a human ear.

Human Ear

An illustration of a human ear.

Section through the inferior portion of the heart, exposing the dome of the diaphragm on the right side.

Cross Section of the Trunk Through the Inferior Portion of the Heart

Section through the inferior portion of the heart, exposing the dome of the diaphragm on the right side.

An illustration of various sound waves.

Sound Waves

An illustration of various sound waves.

An illustration of various sound waves.

Sound Waves

An illustration of various sound waves.