( z^^ ) 



TABLE XXXVIII. 



Syatematio Survey of the Sequence, according to Age, of tlie Human 



Tissne-gronps. 



(Phylogenetio Classification of Vertebrate Tissues.) 



FIBST GROUP: PRIMARY TISSUES (Epithelium). 



1. FiKST Histological Stage of Evolution. 

 I. Covering-tissue (Epithelium). 

 I. A. Skin-coyering tissue (Epmaium dermal.) f^' SandfrfoSS™"^ 



I. B. Intestinal covering tissue {Fpithel. gastrale). ( 1. Real intestinal epithelium 



Intestinal layer, or Kntoderm, of Gastrula<2, Kpithelium of the intestinal glands 

 (afterwards the intestinal-glandular layer) ( 3. ( iiarliest site of origin of egg-cell ?) 



SECOND GROUP: SECONDARY TISSUES. 

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



2. Second Histological Stage of Evolution. 

 II. Connective-tissue (Connectivum). 



II. C. Filling-up tissue (Ma conjunctiva) (softer fj' ?,' t't v "tissu?^"" 



(surrounding] connective tissue) | 3' ^-],„.i„, 1,3,^3 



II. Zl. Supporting tissue (Tela sUUtaris) (firmer f^' *^J'""'f''f^"f,. 



[suy;»rti„|] connective tissue) \l ^^^^^^^^ '"™' 



3. Third Histological Stage op Evolution. 

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



Ul.E. Nerve-tissue (Tela 

 nerwa). Original outer 

 portion of tlie nerve- -I 

 muscle cells of tbe 2. 



III.F. Muscle-tissue (Tela ( -^ 

 muscularis) Originsil 

 inner portion of the K „ 

 nerve-muscle cells of 

 the Exoderm I 



Exoderm 



Nerve-cells 

 (Ganglion-cells) 



Nerve-fibres ' 



(Nerve-tubes) 



One-celled muscle- ■ 

 fibres " 



Many-celledmuscle- i 

 fibres "! 



1. a. Peripheric nerve-cells (Rod -cells of 

 the sense-organs) 



1. h. Central nerve-cells (mind-cells) 



2. a. Sheath less nerve-tibi-es (pale, or 



meduUa-less fibrfs) 

 2, &. Sheathed nerve-fibres (dark fibre'', 

 with medulla) 



1. a. Smooth contractile fibre-cells 

 1 b. Stiipod contractile fibre-cells 



2. a. Smooth muscle-masses 

 2. h. Striped muscle-masses 



4, Fourth Histological Stage of Evolution. 

 IV. Vascular Tissue (Vasalium). 



IV. G. Vascular lining tissue 

 (Tela vasalis). Inner 

 wall-covering of the 

 Ccelom system 



1. Ccelarinm 



(Ca'lom - epithe- 

 lium) 



2. Endothelium 



fl.a. Exocoelarium (Parietal Coelom-epi- 

 L thelium) (and secondary site of 



J origin of the sperm-cells t) 



\ 1 b. Endoccelarium (Visceral ccelom-epi- 

 f thelium) (and secondary site of 



origin of the egg-cells ?) 



■ndotheliura c„ -n j ,., ,. ^,, , 



(Vascular epithe-J 2. «.^ndotheluim of the lymph-vessels 

 lium) l2.b. Endothelium of the blooU-vessels 



ly.II. Lymph-tissue (7Ha f 



lymphatiea). Liquid J 1. T,ymph (Colourless blood-cells and fluid intercellular substancel 

 contents of the Coelom j 2. Blood (Ked blood-cells and fluid intercellular sub-tancel 

 Bybtem \ ■' 



