2.  Also known as the oral cavity  Surface of teeth/gums  Teeth in back

3.  Sensitive  Easily irritated  If the nasal cavity gets irritated it can swell and cause blockage to other sinuses  Divided left/right

4.  Located above the tooth roots  Contain nerve and blood vessels  When teeth become older these become larger  The maxillary sinus is for drainage

5.  Located on the dorsal part of the skull  Two (one on each side between the eyes)  Drainage into the nostrils

6.  One pouch on each side of the throat  Filled with air  Horses, mules and donkeys have the largest pouch known  If the pouch becomes infected, deadly side affects my occur (no cure)  The yellow stands for the two pouches

7.  The soft plate separates the pharynx from the mouth  This flap (soft plate) moves when the horse is swallowing  Its there so that the horse cant inhale anything including air

8.  Located between the pharynx and trachea  Another word for the Larynx is the voice box, it allows the horse to whinny and grunt.

9.  Contains five pieces of cartilage  The trachea carries air to the lungs  In an adult horse its about 80 cm in length  Spongy material

10.  Air passageway  No gas exchange in this airway

11.  Alveolus is connected to the lungs  Thousands of them  Dental surgery can easily damage the alveolus  Dental surgery can damage the alveolus by pinching a nerve in the mouth and transferring to the alveolus and permanently damaging it

12.  The horses large lungs allow it to cool down faster  300 liters of blood go through the lungs, 10 million air sacs deliver over 70 liters of oxygen per min. to muscles when a horse is at a full out gallop  The lungs are made up of a spongy material

13.  Horses can only breath through their nostrils  The avg. respiration rate is 15-20 breaths/minute

14.  http://www.ivis.org/proceedings/aaepfocus/2 006/tremaine1.pdf http://www.ivis.org/proceedings/aaepfocus/2 006/tremaine1.pdf  http://www.britannica.com/EBchecked/topic/ 395124/mouth http://www.britannica.com/EBchecked/topic/ 395124/mouth  http://www.equinekingdom.com/data/educat ion/horse_anatomy/respiratory_system.html http://www.equinekingdom.com/data/educat ion/horse_anatomy/respiratory_system.html  http://en.wikipedia.org/wiki/Respiratory_system _of_the_horse http://en.wikipedia.org/wiki/Respiratory_system _of_the_horse  http://en.mimi.hu/horse/larynx.html http://en.mimi.hu/horse/larynx.html  http://www.horseandhound.co.uk/horsecare/1 370/34656.html http://www.horseandhound.co.uk/horsecare/1 370/34656.html