THE HORSE ANATOMY AND PHYSIOLOGY. 



619 



tion from the food ; but the depuration or power to remove or 

 eliminate impurities is so essential to life, that though the animal 

 may live many days without the secretory organs taking up 

 nourishment, yet if the depuration or removal of impurities of 

 blood ceases but for a few hours, death must speedily follow. 



If saliva and gastric juice and bile are not mixed with the 

 food, nutrition will be imperfect and health suffer. If the ele- 



SECTION OF HORSE SHOWING DIGESTIVE APPARATUS. 



1 Mouth. 2. Pharynx. 3. CEsophagus. 4. Diaphragm. 5. Spleen. 6. Stomach. 7. Duo- 

 denum. 8. Liver (upper ext.). 9. Large colon. 10. Caecum. 11. Small Intestine. 1'i 

 Floating colon. 13. Rectum. 14. Anus. 15. Left kidney and ureter. 16. Bladder. 17. 



Urethra. 



ments of bile and urine, for example, are not eliminated from 

 the blood, the system is deranged and death must follow. Hence 

 the importance of arranging the diet of our animals so that the 

 processes of digestion, secretion, and depuration can be insured 

 to go on harmoniously and without check. The chief organs for 

 cleansing the blood of impurities, are the lungs, which remove 

 carbon; the liver, which secretes bile; the kidneys, which get 



