212 PHYSIOLOGY AT THE FARM. 



and organs in turn are composed of textures or tissues, some 

 more, some less simple. The simplest textures or tissues can- 

 not be decomposed farther, unless into the proximate chemical 

 principles of organic nature ; and the resolution of these, when 

 in their normal state of simplicity, yields the ultimate ele- 

 ments that is to say, such simple substances as oxygen, 

 nitrogen, hydrogen, carbon, sulphur, and the like. 



The organised constituents of the animal frame that is, the 

 textures and the fluids containing organic particles are as 

 follows : 



1. The blood, chyle, and lymph. 



2. Epidermic tissue, including epithelium, cuticle, nails or hoof, and 

 hairs. 



3. Pigment. 



4. Adipose tissue. 



5. Areolar, cellular, or connective tissue. 



6. Fibrous tissue. 



7. Elastic tissue. 



8. Cartilage and its varieties. 



9. Bone or osseous tissue. 



10. Muscular tissue. 



11. Nervous tissue. 



12. Blood-vessels. 



13. Absorbent vessels and glands. 



14. Serous and syiiovial membranes. 



15. Mucous membranes. 



16. Skin. 



17. Secreting glands. 



18. Vascular or ductless glands. 



The textures here enumerated are not simple tissues, but 

 are more or less compounded ; while several textures which 

 are very local in their character are omitted, as better spoken 

 of along with the organs in which they occur. Of this descrip- 

 tion are the crystalline lens of the eye and the enamel of the 

 teeth. 



It should be remarked further that some of the textures 



