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 (Umhiillungstheorie) 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, 



