I2 4 



SUDORIPAROUS GLANDS. 



[sect. 67. 



employment of boiling saves much time. In examining foetal hairs, if the 

 subject be very young, the epidermis should be pulled off, on the inner sur- 

 face of which the rudiments will be found ; in older embryos fine sections 

 through the skin may be made ; or the corium may be removed with the 

 epidermis, in which case caustic soda is of good service. 



Literature.— Eschricht, in Mull. Arch. 1837, p. 37 ; v. Laer, de Structura 

 Capill. Hum, Observationibus microscopicis ittustr. Dissert, inaug. Traject. ad 

 Rkenum, 1841 ; G. Simon, Mull. Archiv. 1 841, p. 361; Kohlrausch, Mull. 

 Arch. 1846, p. 300 ; J;esche, de Telis Epithelial ibus in genere et de vis Vasorum 

 in specie. Dorpat. 1847 ; Kolliker, in Mitth. der Ztirch. Naturf. Oesch. 

 1847, p. 177; Hessling, in Fror. Not. 1848, No. 113; Langer, Denkschr. 

 d. Wien. Akad. 1850, Bd. I. ; E. Reissner, de Hominis Mammal. Pilis. Dorp. 

 1853. Dissert ; Dalzell, in the Monthly Journal, 1853, p. 279. 



Fig. 54. 



IV. — Of the Glands of the Skin. 



A. OF THE SUDORIPAROUS GLANDS. 



§ 67. The Sudoriparous Glands are simple glands, consisting of 

 a delicate, more or less convolute tube, which secrete the sweat. 

 They occur over the whole extent of the skin, with the exception 

 of the concave side of the concha of the ear, the external auditory- 

 passage, the glans penis, one lamella of the prepuce, and a few 

 other places ; and open at its surface by numerous fine orifices. 

 In every sudoriparous gland (fig. 59) we distinguish the 



glandular coil, or the 

 proper gland from the 

 excretory duct, the canalis 

 sudoriferus. The former 

 is a rounded or oblong 

 body of a yellowish or 

 yellowish-red transpa- 

 rent colour, which, as a 

 rule, measures ith to -]-th 

 of a line; but, on the eye- 

 lids, the skin of the penis, 

 scrotum, nose, and con- 

 vex side of the concha of 

 the ear, only -^th to ^th 

 of a line ; whilst in the 

 areola of the nipple and 

 its neighbourhood, on 

 the root of the penis, and between the scrotum and perineum, 

 it measures as much as half a line ; finally, in the hairy parts of 

 the arm-pits it attains j to 1 or 1} lines in thickness, and 1 to 3 

 lines in breadth. 



A sudoriparous glandular coil and its vessels, magnified 

 35 times, a. glandular coil; 6. excretory duct, or sudoripa- 

 rous canal ; c c. vessels of a glandular coil. After Todd and 

 Bowman. 



