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A frog's ear drum works in very much the same way as does a human eardrum. It is a membrane that is stretched across a ring of cartilage like a snare drum that vibrates. Crossing the middle ear chamber there is an ossicle called the columella that is connected to the tympanum, and another ossicle, the operculum, that connects this to the oval ...
Tympanal organ on the tibia of the katydid Zabalius aridus Tympanal organ of two species of moths, ventral view of abdomen (Tineidae and Pyralidae). A tympanal organ (or tympanic organ) is a hearing organ in insects, consisting of a tympanal membrane stretched across a frame backed by an air sac and associated sensory neurons. [1]
The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call. The presence or development of the vocal sac is one way of externally determining the sex of a frog or toad in many species; taking frogs as an example;
Tympanum (anatomy), a hearing organ/gland in frogs and toads, a flat red oval on both sides of a frog's head; Tympanum, in biology, the eardrum; Tympanum, or tympanal organ, a hearing organ in insects; Tympanum (hand drum), a percussion instrument in ancient Greece and Rome; Timpano, in music, singular of timpani, a kettledrum
Phrynopus are small to medium-sized frogs, from 14.5 mm (0.57 in) snout–vent length in Phrynopus auriculatus to 54 mm (2.1 in) in Phrynopus kauneorum. Head is narrower than the body. Differentiated tympanic membrane and tympanic annulus are usually absent, except in Phrynopus auriculatus and Phrynopus peruanus, two basal species.
In birds, the columella is anchored to the conical tympanic membrane at an acute angle, rather than a 90-degree angle relative to the plane of the tympanic membrane. This is thought to provide a lever advantage in conducting airborne sound from the distal to the proximal end of the columella. [6]
In the anatomy of humans and various other tetrapods, the eardrum, also called the tympanic membrane or myringa, is a thin, cone-shaped membrane that separates the external ear from the middle ear. Its function is to transmit changes in pressure of sound from the air to the ossicles inside the middle ear, and thence to the oval window in the ...
Auditory ossicles from a deep dissection of the tympanic cavity. Sound waves travel through the ear canal and hit the tympanic membrane, or eardrum. This wave information travels across the air-filled middle ear cavity via a series of delicate bones: the malleus (hammer), incus (anvil) and stapes (stirrup).