LECTURE II. 



FEBRUARY 17, 1858. 

 PHYSIOLOGICAL TISSUES. 



Falsity of the view that tissues and fibres are made up of globules (elementary 

 granules) The investment theory (Umhullungstheorie) Equivocal [spontane- 

 ous] generation of cells The law of continuous development. 



General classification of the tissues The three categories of General Histology 

 Special tissues Organs and systems, or apparatuses. 



The EPITHELIAL TISSUES Squamous, cylindrical, and transitional epithelium- 

 Epidermis and rete Malpighii Nails, and their diseases Crystalline lens 

 Pigment Gland-cells. 



The CONNECTIVE TISSUES The theories of Schwann, Henle, and Reichert My 

 theory Connective tissue as intercellular substance Cartilage (hyaline, fibro- 

 and reticular) Mucous tissue Adipose tissue Anastomosis of cells ; juice- 

 conveying system of tubes or canals. 



IN my first lecture, gentlemen, I laid before you the 

 general points to be noted with regard to the nature and 

 origin of cells and their constituents. Allow me now to 

 preface our further considerations with a review of the 

 animal tissues in general, and this both in their physio- 

 logical and pathological relations. 



The most important obstacles which, until quite 

 recently, existed in this quarter, were by no means 

 chiefly of a pathological nature. I am convinced that 

 pathological conditions would have been mastered with 

 far less difficulty if it had not, until quite lately, been 

 utterly impossible to give a simple and comprehensive 

 sketch of the physiological tissues. The old views, 



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