Changes

During exercise or during respiratory distress, the mouth can be used as an additional opening of the respiratory system and then the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]] also becomes an air-way.

During exercise or during respiratory distress, the mouth can be used as an additional opening of the respiratory system and then the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]] also becomes an air-way.

The pharynx can be split into different regions- the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]], oesophageal/laryngeal pharynx and the [[Nasopharynx - Anatomy & Physiology|nasal pharynx]]

The pharynx can be split into different regions- the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]], [[Larynx - Anatomy & Physiology#Laryngeal Pharynx|laryngeal pharynx]] (sometimes referred to as the oesophageal pharynx) and the [[Nasopharynx - Anatomy & Physiology|nasopharynx]]

==Structure==

==Structure==

*Caudal and dorsal to the laryngeal opening is the opening into the [[Oesophagus - Anatomy & Physiology|oesophagus]]

*Caudal and dorsal to the laryngeal opening is the opening into the [[Oesophagus - Anatomy & Physiology|oesophagus]]

*In the dorsal region of the [[Nasopharynx - Anatomy & Physiology|nasal pharynx]] there are paired openings into the Auditory (Eustacian) Tubes

*In the dorsal region of the [[Nasopharynx - Anatomy & Physiology|nasopharynx]] there are paired openings into the Auditory (Eustacian) Tubes

*The lining of the middle ear cavity and auditory tube is continuous with that of the [[Nasopharynx - Anatomy & Physiology|nasal pharynx]]

*The lining of the middle ear cavity and auditory tube is continuous with that of the [[Nasopharynx - Anatomy & Physiology|nasopharynx]]

*Walls are muscular

*Walls are muscular

*During [[Deglutition|swallowing]] the [[Soft Palate - Anatomy & Physiology|soft palate]] is raised which divided the pharynx into dorsal and ventral sections

*During [[Deglutition|swallowing]] the [[Soft Palate - Anatomy & Physiology|soft palate]] is raised which divided the pharynx into dorsal and ventral sections

**Laterally, two pairs of palatopharyngeal arches are present from the [[Soft Palate - Anatomy & Physiology|soft palate]] to the [[Oesophagus - Anatomy & Physiology|oesophagus]]

**Laterally, two pairs of palatopharyngeal arches are present from the [[Soft Palate - Anatomy & Physiology|soft palate]] to the [[Oesophagus - Anatomy & Physiology|oesophagus]]

**The dorsal compartment is the [[Nasopharynx - Anatomy & Physiology|nasal pharynx]]

**The dorsal compartment is the [[Nasopharynx - Anatomy & Physiology|nasopharynx]]

**The rostral compartment is the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]]

**The rostral compartment is the [[Oral Cavity - Oropharynx - Anatomy & Physiology|oropharynx]]

'''Canine'''

'''Canine'''

*Single duct connects [[Nasopharynx - Anatomy & Physiology|nasal pharynx]] to the nasal cavity

*Single duct connects [[Nasopharynx - Anatomy & Physiology|nasopharynx]] to the nasal cavity

*Tonsils are a compact mass which point away from the lumen of the pharynx

*Tonsils are a compact mass which point away from the lumen of the pharynx

[[Nasopharynx - Anatomy & Physiology]]

[[Nasopharynx - Anatomy & Physiology]]

<big><center>[[Musculoskeletal System - Anatomy & Physiology|'''BACK TO MUSCULOSKELETAL ANATOMY AND PHYSIOLOGY''']]</center></big>

<big><center>[[Musculoskeletal System - Anatomy & Physiology|'''BACK TO MUSCULOSKELETAL ANATOMY AND PHYSIOLOGY''']]</center></big>