Changes

*The Guttural Pouch is located below the cranial cavity, towards the caudal end of the [[Skull and Facial Muscles - Anatomy & Physiology#Bones of the Skull|skull]].

*The Guttural Pouch is located below the cranial cavity, towards the caudal end of the [[Skull and Facial Muscles - Anatomy & Physiology#Bones of the Skull|skull]].

*It is covered laterally by the Pterygoid muscles, parotid and mandibular glands. The floor lies mainly on the pharynx. It is moulded to the Stylohyoid muscle which divides the medial and lateral compartments.

*It is covered laterally by the Pterygoid muscles, [[Parotid|parotid]] and [[Mandibular|mandibular]] glands. The floor lies mainly on the pharynx. It is moulded to the Stylohyoid muscle which divides the medial and lateral compartments.

*The Guttural Pouch has close association with many major structures including several cranial nerves (Glossopharyngeal, Vagus, Accessory, Hypoglossal), the Sympathetic Trunk and the External and Internal Carotid Arteries. The pouch directly covers the temporohyoid joint.

*The Guttural Pouch has close association with many major structures including several cranial nerves (Glossopharyngeal, Vagus, Accessory, Hypoglossal), the Sympathetic Trunk and the External and Internal Carotid Arteries. The pouch directly covers the temporohyoid joint.

*The pouch has an extremely thin wall which is lined by respiratory epithelium which secretes mucous. This normally drains into the pharynx when the horse is grazing.

*The pouch has an extremely thin wall which is lined by respiratory epithelium which secretes mucous. This normally drains into the pharynx when the horse is grazing.