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  2. Emphysema - Wikipedia

    en.wikipedia.org/wiki/Emphysema

    Emphysema. Emphysema is any air-filled enlargement in the body's tissues. [5] Most commonly emphysema refers to the permanent enlargement of air spaces (alveoli) in the lungs, [5][6] and is also known as pulmonary emphysema. Emphysema is a lower respiratory tract disease, [7] characterised by enlarged air-filled spaces in the lungs, that can ...

  3. Outer ear - Wikipedia

    en.wikipedia.org/wiki/Outer_ear

    Utricle. Saccule. Cochlea. Semicircular canals. v. t. e. The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. [1] It gathers sound energy and focuses it on the eardrum (tympanic membrane).

  4. Bird anatomy - Wikipedia

    en.wikipedia.org/wiki/Bird_anatomy

    The anatomy of bird's respiratory system, showing the relationships of the trachea, primary and intra-pulmonary bronchi, the dorso- and ventro-bronchi, with the parabronchi running between the two. The posterior and anterior air sacs are also indicated, but not to scale. Inhalation–exhalation cycle in birds.

  5. Eustachian tube - Wikipedia

    en.wikipedia.org/wiki/Eustachian_tube

    The Eustachian tube (/ juːˈsteɪʃən /), also called the auditory tube or pharyngotympanic tube, [1] is a tube that links the nasopharynx to the middle ear, of which it is also a part. In adult humans, the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. [2] It is named after the sixteenth-century Italian ...

  6. Ossicles - Wikipedia

    en.wikipedia.org/wiki/Ossicles

    The ossicles (also called auditory ossicles) are three bones in either middle ear that are among the smallest bones in the human body. They serve to transmit sound vibrations sent from the ear drum to the fluid-filled labyrinth (cochlea). The absence of the auditory ossicles would constitute a moderate-to-severe hearing loss.

  7. Middle ear - Wikipedia

    en.wikipedia.org/wiki/Middle_ear

    The middle ear is the portion of the ear medial to the eardrum, and distal to the oval window of the cochlea (of the inner ear). The mammalian middle ear contains three ossicles (malleus, incus, and stapes), which transfer the vibrations of the eardrum into waves in the fluid and membranes of the inner ear. The hollow space of the middle ear is ...

  8. Ear canal - Wikipedia

    en.wikipedia.org/wiki/Ear_canal

    6867. FMA. 61734. Anatomical terminology. [edit on Wikidata] The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the auricle to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.

  9. Stapes - Wikipedia

    en.wikipedia.org/wiki/Stapes

    v. t. e. 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 (or base) to transmit sound energy through the oval window into the inner ear.