136 OF THE FUNCTIONS OF 



Such are the cellular substance, the epidermis and 

 reticulum mucosum, the hairs and nails. 



The cartilages, bones, periosteum, and marrow. 



The tendons, aponeuroses, and ligaments. 



Most extended internal membranes, as the dura 

 mater and arachnoid; the pleura, mediastinum, and 

 pericardium ; the peritonaeum ; also the cornea, &c. 



The greater part of the absorbent system, especially 

 the thoracic duct. 



Lastly, the secundines and umbilical chord. (D) 



211. The ultimate origin of most nerves from the 

 brain cannot be detected. A question is agitated even 

 at the present day, — whether the nerves of each side 

 arise from the corresponding or the opposite portion of 

 the brain.* The latter opinion is countenanced by 

 certain pathological phenomena, f and by the decussa- 

 tion of fibres in the medulla oblongata;}; and conjunc- 

 tion of the optic nerves. §(E) 



212. A continuation of the pia mater follows the me- 



and cried out on the approach of the instrument. The latter might be agitated 

 from the dread of fresh torment, on seeing the knife ; and the former, having 

 suffered great torture, might have been insensible to the less violent irritation 

 of the medulla, even although it be endowed with nerves. 



* Lassus has diligently collected the different opinions of writers on this 

 point, Sur let de'eouvertes fait a en Anatomie. p. 299 sq. 



+ Compare Mein. Sim. Du Pui, De homine dexiro et sinittro. LB. 1780. 

 8vo. p. 107 sq. 



♦ v. Gall and Spurzheim, and likewise Osiander. 11. cc 



§ Sommcrring, Hcssuchen Beytrigen zur Gelekrsatnkeit. P. i. and iv. 



F. N. Nothig, (prses. Soinmerring) De decustatione nervorum optic. Mogunt. 

 1786. 8vo. 



J. F. Ackermann in the Biblioth. Medica which I published, vol. iii. 

 p. 337, 706. 



Hor. Caldani, Ojmscula Anatomic*. PaUv. 1803. 4to. p. 111. 



J. and C. Wcnzel. Piodroinnt fine* Werket fiber dms Him. p. 11. 



