Changes

===Pharyngeal===

===Pharyngeal===

<p>''Also called adenoids''</p>

<p>''Also called adenoids''</p>

<p>Present in all the species they are located on the pharyngeal septum in the nasopharynx. In cattle it is located on the caudal end of the septum.</p>

<p>Present in all the species they are located on the pharyngeal septum in the [[Nasopharynx - Anatomy & Physiology|nasopharynx]]. In cattle it is located on the caudal end of the septum.</p>

===Palatine===

===Palatine===

<p>''In common speech these are “the tonsil"''</p>

<p>''In common speech these are “the tonsil"''</p>

Present all species except the pig and are located dorsally in the lateral walls of [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]]. In cattle and dogs and cats they are compact and in cattle they project away from oropharynx lumen and in cats and dogs they project towards the lumen. In horses they are diffuse.

Present all species except the pig and are located dorsally in the lateral walls of [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]]. In cattle and dogs and cats they are compact and in cattle they project away from [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]] lumen and in cats and dogs they project towards the lumen. In horses they are diffuse.

===Soft palate===

===Soft palate===

===Tubal===

===Tubal===

Absent in the cat and dog. They are located in the lateral wall of the nasopharynx and provide protection to the entrance of the auditory tubes. Compact in cattle and pigs and diffuse in horses.

Absent in the cat and dog. They are located in the lateral wall of the [[Nasopharynx - Anatomy & Physiology|nasopharynx]] and provide protection to the entrance of the auditory tubes. Compact in cattle and pigs and diffuse in horses.

===Lingual===

===Lingual===

Found in varying degrees in all species on floor of [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]].

Found in varying degrees in all species on floor of [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]].

===Paraepiglottic===

===Paraepiglottic===

Present in the pig and are found rostrolateral to epiglottis base.

Present in the pig and are found rostrolateral to [[Epiglottis|epiglottis]] base.

===Histology===

===Histology===

<gallery perrow="3">

<gallery perrow="3">

==Functions==

==Functions==

The tonsils are a [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary lymphoid tissue]] and [[Lymphocytes - WikiBlood#B cells|B cells]] in the tonsils become committed to synthesise IgA.

The tonsils are a [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary lymphoid tissue]] and [[Lymphocytes - WikiBlood#B cells|B cells]] in the tonsils become committed to synthesise [[Immunoglobulin A - WikiBlood|IgA]].

==Links==

==Links==

*[[Actinobacillus species#Actinobacillus pleuropneumoniae|Actinobacillus pleuropneumoniae]] in pigs may remain undetected by serological tests and swabbing in on the palatine tonsil

*[[Actinobacillus species#Actinobacillus pleuropneumoniae|Actinobacillus pleuropneumoniae]] in pigs may remain undetected by serological tests and swabbing in on the palatine tonsil