Changes

===Thyroid Cartilage===  

===Thyroid Cartilage===  

[[Image:Thyroid cartilage.jpg|thumb|right|150px|Thyroid Cartilage - Copyright nabrown RVC]]

[[Image:Thyroid cartilage.jpg|thumb|right|250px|Thyroid Cartilage - Copyright nabrown RVC]]

*[[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|Hyaline cartilage]]

The thyroid cartilage is [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]] and forms most of the floor of the larynx. The fusion of the two lateral plates varies in different species. The rostral part forms the 'Adam's apple'. The thyriod cartilage articulates with the '''thyrohyoid bone''' and the '''cricoid cartilage'''. It becomes brittle as the animal ages.

*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===

[[Image:Cricoid cartilage.jpg|thumb|right|150px|Cricoid Cartilage - Copyright nabrown RVC]]

[[Image:Cricoid cartilage.jpg|thumb|right|250px|Cricoid Cartilage - Copyright nabrown RVC]]

*[[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|Hyaline cartilage]]

The cricoid cartilage is also [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]]. It is signet ring shaped and is wider on the dorsal surface than the ventral surface. There is a crest on the midline of the dorsal surface and facets for '''arytenoid cartilages''' on the rostral egde. The cricoid cartilage articulates with the '''thyroid cartilage'''. It also becomes brittle as the animal ages.

 

*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===

[[Image:Arytenoid cartilages.jpg|thumb|right|150px|Arytenoid Cartilages - Copyright nabrown RVC]]

[[Image:Arytenoid cartilages.jpg|thumb|right|250px|Arytenoid Cartilages - Copyright nabrown RVC]]

*[[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|Hyaline cartilage]]

The arytenoid cartilage is also [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]]. It is paired and articulates with the rostral part of the '''cricoid cartilage'''. A '''vocal process''' is present on the caudal surface where the vocal folds attach; a muscular process extends laterally and a corniculate process extends dorsomedially. (elastic cartilage)

 

 

*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===

[[Image:Epiglottic cartilage.jpg|thumb|right|150px|Epiglottic Cartilage - Copyright nabrown RVC]]

[[Image:Epiglottic cartilage.jpg|thumb|right|250px|Epiglottic Cartilage - Copyright nabrown RVC]]

 

 

 

 

 

*During [[Deglutition|deglutition]] the large blade part of the epiglottic cartilage partially covers the entrance to the trachea

The epiglottic cartilage is [[Bones and Cartilage - Anatomy & Physiology#Elastic Cartilage|elastic cartilage]]. It is flexible and the most rostral type of cartilage. The thinner stalk-like part is attached to the root of the [[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===

===Interarytenoid Cartilage===