Syrinx (bird anatomy)
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The syrinx is the vocal organ of birds. Located at the base of a bird's trachea, it produces sounds without the vocal folds of mammals. The sound is produced by vibrations of some or all of the membra
Schematic drawing of an avian syrinx 1: last free cartilaginous tracheal ring, 2: Trachea 3: first group of syringeal rings, 4: pessulus, 5: membrana tympaniformis lateralis, 6: membrana tympaniformis medialis, 7: second group of syringeal rings, 8: main bronchus, 9: bronchial cartilage
The syrinx of hornbills
Suboscines and a shoebill
Large bulla in a male (left) and smaller bulla structure in a female (right).
Trachea
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The trachea, also known as the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all land vertebrate anim
Cross-section of the trachea, with pseudostratified ciliated columnar epithelium and goblet cells labelled
Magnified cross-section of the cartilage of the trachea
Trachea
Tracheal system of dissected cockroach. The largest tracheae run across the width of the body of the cockroach and are horizontal in this image. Scale bar, 2 mm.