Changes

==Species Differences==

==Species Differences==

* The functional shape of the pinna in wild-type mammals is erect, and the muscular connections at the base of the pinna allowing positional adjustments to efficiently collect sound.  Many domesticated species, however, have non-erect, pendulous pinnae, as a result of selective breeding.  This and other conformational changes may contribute to aural disease, particularly in the dog, but also other species including the lop-eared rabbit.[[image: Rabbit ears.jpg|thumb|250px|left|Two rabbits: one with wild-type erect pinnae, the other with pendulous pinnae for comparison]]

* The functional shape of the pinna in wild-type mammals is erect, and the muscular connections at the base of the pinna allowing positional adjustments to efficiently collect sound.  Many domesticated species, however, have non-erect, pendulous pinnae, as a result of selective breeding.  This and other conformational changes may contribute to aural disease, particularly in the dog, but also other species including the lop-eared rabbit

 

*'''The Cochlea''': the spiral has 3 turns in carnivores, 2.5 turns in horses, 4 turns in the pig, and 3.5 turns in ruminants.

*'''The Cochlea''': the spiral has 3 turns in carnivores, 2.5 turns in horses, 4 turns in the pig, and 3.5 turns in ruminants.

* The [[Guttural Pouches - Anatomy & Physiology|guttural pouch]] is an anatomical structure that is only found in the horse and other perissodactyla.[[Image:Equine Guttural Pouch.jpg|thumb|right|150px|Equine Guttural Pouch - Copyright David Bainbridge]]

* The [[Guttural Pouches - Anatomy & Physiology|guttural pouch]] is an anatomical structure that is only found in the horse and other perissodactyla.[[Image:Equine Guttural Pouch.jpg|thumb|right|150px|Equine Guttural Pouch - Copyright David Bainbridge]]