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Larynx - Anatomy & Physiology (view source)
Revision as of 20:12, 28 July 2008
, 20:12, 28 July 2008no edit summary
*Moves position when the animal [[Deglutition|swallows]] due to its attachments to the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] and the [[Hyoid Apparatus - Anatomy & Physiology|hyoid apparatus]]
*Moves position when the animal [[Deglutition|swallows]] due to its attachments to the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] and the [[Hyoid Apparatus - Anatomy & Physiology|hyoid apparatus]]
*
===Thyroid Cartilage===
===Thyroid Cartilage===
*
*Hyaline cartilage
*Forms most of the floor of the larynx
*Fusion of the two lateral plates varies in different species
*Rostral part forms the 'Adam's apple'
*Articulates with the thyrohyoid bone
*Articulates with the cricoid cartilage
*Becomes brittle as the animal ages
===Cricoid Cartilage===
===Cricoid Cartilage===
*
*Hyaline cartilage
*Signet ring shape
**Wider on dorsal surface
**Narrower on ventral surface
*Crest on midline of dorsal surface
*Facets for arytenoid cartilages on rostral egde
*Articulates with the thyroid cartilage
*Becomes brittle as the animal ages
===Arytenoid Cartilage===
===Arytenoid Cartilage===
*
*Hyaline cartilage
*Paired
*Articulates with the rostral part of the cricoid cartilage
*Vocal process present on caudal surface where the vocal folds attach
**Muscular process extending laterally
**Corniculate process extending dorsomedially (elastic cartilage)
===Epiglottic Cartilage===
===Epiglottic Cartilage===
*Elastic cartilage
*Flexible
*Most rostral
*Thinner stalk-like part is attached to the root of the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]], body of the thyroid cartilage and the basihyoid bone
*The larger blade-like part lies behind the soft palate and points dorso-rostrally
*During [[Deglutition|deglutition]] the large blade part of the epiglottic cartilage partially covers the entrance to the trachea
==Interarytenoid Cartilage===
*Nodule of hyaline cartilage
*Between arytenoid cartilages dorsally
===Cuneiform Process===
*Elastic cartilage
*Supports mucosal folds from [[Epiglottis|epiglottis]] to arytenoid cartilages
*Not present in all species
*Free or fused with the epiglottic cartilages and arytenoid cartilages depending on species
==Function==
==Function==
==Species Differences==
==Species Differences==
*
===Equine===
*Fusion of the two plates of the thyroid cartilage is least extensive forming a rostral pointing notch which is a good site for surgical entry into the larynx
==Links==
==Links==