GENERAL HISTOLOGY. I \7 



fact that the cells take on a definite form and arrangement, 

 in part upon the formation of plasmic products, which de- 

 termine the character of the tissue (muscle-fibres, connec- 

 tive-tissue fibrils). 



7. According to function and structure are distinguished 

 (i) epithelia, (2) connective tissue, (3) muscular-tissue, (4) 

 nervous-tissue. 



Classification of Tissues. 8. The physiological char- 

 acter of cpitJielia is given in the fact that they cover the 

 surfaces of the body, their morphological character in that 

 they consist of closely compressed cells united only by a 

 cementing substance. 



o 



9. According to their further functional character epi- 

 thelia are divided into glandular epithelia (unicellular and 

 multicellular glands), sensory, germinal, and pavement 

 epithelia. 



10. According to the structure are distinguished one- 

 layered (cubical, cylindrical, pavement epithelia) and 

 many-layered epithelia, ciliated and flagellated epithelia, 

 epithelia with or without cuticle. 



1 1 . The physiological character of the connective tissues 

 rests upon the fact that they fill up spaces between other 

 tissues in the interior of the body. 



12. The morphological character depends upon the 

 presence of the intercellular substance. 



13. According to the quantity and the structure of the 

 intercellular substance the connective substances are divided 

 into (i) cellular (with little intercellular substance); (2) 

 homogeneous; (3) fibrillar connective tissue; (4) cartilage; 

 (5) bone. 



14. The physiological character of muscular tissue is 

 contained in the increased capacity for contraction. 



15. The morphological character is found in the fact 

 that the cells have secreted muscle-substance. 



1 6. According to the nature of the muscle-substance 

 are distinguished smooth and cross-striated muscle-fibres. 



17. According to the character and derivation of the 

 cells (muscle-corpuscles) the musculature is divided into 



