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TABLE XXXVIII. 



Systematic Survey of the Sequence, according to Age, of the Human 



Tissue-groups. 

 (Phylogenetic Classification of Vertebrate Tissues.) 



FIRST GROUP: PRIMARY TISSUES (Epithelium). 



1. FlEST HlSTOLOGICAL STAGE OF EVOLUTION. 



I. Covering-tissue (Epithelium). 

 LA. Skin-covering tissue (Epithelium &*> f 



I. B. Intestinal covering tissue (Epitliel. pastrale 

 Intestinal layer, or Kntoderm, of G 

 (afterwards the intestinal-glandular laye 



ale). ( 1. Real intestinal epithel 

 trula-j 2. Epithelium of the inte 

 r) (3. (burliest site of origin 



Hum 



testinal glands 

 ' of egg-cell .') 



SECOND GROUP : SECONDARY TISSUES. 

 (All derived from the Covering-tissue, or Epithelium.) 



2. SECOND HISTOLOGICAL STAGE OF EVOLUTION. 

 II. Connective-tissue (Connectivum). 



II C. Filling-tip tissue (TAo. conjunctiva) (softer]'' Fkt&'itan?*' 1 * 

 [surrounding] connective tissue) j 3 ; jn* Ilssue 



II D. Supporting tissue (Tfeto rtefefcuii) (firmer/*' ' 



[supporting] connective tuuiue) 1 



8. THIRD HISTOLOGICAL STAGE OF EVOLUTION. 

 III. Nerve-muscle Tissue (Neuro-musculum). 



4. FOURTH HISTOLOGICAL STAGE OF EVOLUTION. 

 IV. Vascular Tissue (Vasalium). 



. a. Exocoelarium (Parietal Ccelom-epi- 

 1. Coelarium 



Vascularlining tissue (Coslom - epithe- 



(nla vasalis). Inner 



wall-covering of the 

 Ccelom system 



IV.Jff- Lymph-tissue (Tela ( 

 lymphaticd). Liquid I 



2 E rV^ular^mthe 

 Stam) 



thelium) (and secondary site 



origin of the sperm-cells .') 

 1 6. Endocoslarium (Visceral coelom-epi- 



thelium) (and secondary site of 



origin of the egg-cells ?) 

 2. a. Endothelium of the lymph-vessels 

 2. 6. Endothelium of the blood-vessels 



IT.ymph (Colourless blood-cells and fluid intercellular substance) 

 2. Bluod (Red blood-cells and fluid intercellular substance) 



