138 



GENERAL ANALYSIS. 



624. Summing up : 



FLUIDS < 



SECTION IH. 

 Gases. 



525. IT is NOT KNOWN how many kinds of gases 

 are uniformly present in the Body, nor is their use or 

 mode of action well understood. 



526. CARBONIC ACID AND OXYGEN GAS, in larger 

 or smaller quantities, can always be found in the Blood, 

 and are essential to its efficiency ; the others found at 

 times are probably accidental. 



527. THUS ANALYSIS FINDS the three forms of mat- 

 ter, Tissues, Liquids, and Gases, essential to the compo- 

 sition and action of Organs. 



528. IT is EVIDENT that in passing from the study 

 of the Organs and their uses to that of Tissues, Fluids, 

 Gases, and their Properties, the character of the study 

 has changed from that of special parts to that of general 

 parts, or those common to many organs. Hence, 



529. The study of parts above Tissues is called 

 Special, and the study of all below Organs is called 

 General Physiology, Anatomy, and Hygiene. For the 

 former the unassisted eye is sufficient, for the latter the 

 microscope is necessary. 



624. Table of ? 525 What ? 526. Where found ? 527. What does ? 

 628. What ? 529. Define special and general. 



