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1 EXTERNAL EAR. Auris externa. The part of the ear consisting of the auricle (pinna) and external acoustic meatus.

2 External acoustic (auditory) meatus (canal).

Meatus acusticus externus. Flat, partly cartilaginous, partly bony, S-shaped canal about 2.4 cm long with a diameter of about 6 mm. C

3 External opening of acoustic canal. Porus acusticus extrnus. C

3 a Tympanic notch. Incisura tympanica. Defect between the greater and lesser tympanic spines. In the newborn, it is the superior gap between the still free ends of the tympanic ring. See p. 16.8

4 Cartilaginous part of external acoustic mea-tus. Meatus acusticus externus cartilagineus. Lateral, cartilaginous third of the external acoustic meatus. C

5 Cartilage of external acoustic meatus. Cartilago meatus acustici. Together with the cartilage of the pinna, it forms a groove that opens superiorly and posteriorly. D

6 Incisurae cartilaginis meatus acustici. Two fissures in the cartilage of the external acoustic meatus. They are bridged by connective tissue and are usually directed anteriorly. D

7 Lamina tragi. Lateral part of the meatal cartilage. It lies in front of the external opening of the acoustic meatus. D

8 Auricle (Pinna). Auricula. A B

9 Ear lobe. Lobulus auricularis. Lower end of the pinna devoid of cartilage. A B C

10 Auricular cartilage. Cartilago auricularis. Structural framwork of the pinna consisting of elastic cartilage. D

11 Helix. External, curved margin of the auricle. A BCD

12 Crus of helix. Crus helicis. Site of origin of the helix in the cavity (concha) of the auricle. A B D Spine of helix. Spina helicis. Small, forward-projecting cartilaginous prominence on the crus helices. D

Tail of helix. Cauda helicis. Posterior, inferior end of the helix separated from the antitragus by an indentation. D

Antihelix[[anthelix]].Archedprojection located in front of the posterior part of the helix. A B C D Tringular fossa. Fossa triangularis. Antero-superiorly located fossa enclosed by the two crura of the anthelix. A D Crura of anthelix (antihelix). Crura antheli-cis. Formed by the bifurcation of the anthelix superiorly, the two crura form the boundary of the triangular fossa. A D Scaphoid fossa. Scapha. Narrow fossa situated posteriorly between the helix and anthelix. A D Concha (cavity) of auricle. Concha auricularis. It is embraced by the anthelix, antitragus and tragus. A

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