466 



ANATOMY FOR NURSES 



[Chap. XXI 



Mammary 

 Glands 



Colostrum 



MUk 



Nerves 



Develop- 

 ment 



Secretion 

 of milk 



Male Gen- 

 erative 

 Organs 



Intercostal. 



Primary development at time of puberty, prob- 

 ably due to internal secretion of ovaries. 



Functional development follows conception, 

 probably due to chemical substances that 

 result from metabolism of foetus. Active se- 

 cretion stimulated by emptying milk ducts 

 and influenced by nervous system. 



Water \ 



Salts > Secreted from blood. 



I Sugar J 



Proteins 



Fat 



Formed by disintegration of 

 cells lining lactiferous tubules. 

 Thin yelIo\A'ish fluid secreted during first few days of lactation. 



Composi- 

 tion 



Composi- 

 tion 



Proteins 

 Fat . 

 Sugar 

 Salts . 

 Water 



Water . 

 Proteins 

 Fat . . 

 Lactose 



Salts 



Human 

 87.30 % 

 1.50% 

 4.00 % 

 7.00 % 

 0.20 % 



5.71 per cent 

 2.04 per cent 

 3.74 per cent 

 0.28 per cent 

 88.23 per cent 

 100.00 per cent 

 Cow's 



Differ- 

 ences 



100.00 % 

 Diff'erent relative proportions. 



Human / Caseinogen § 



87.00 % 

 4.00 % 

 4.00 % 

 4.30 % 

 0.70 % 

 100.00 % 



Difference in 

 proteins 



Difference in 

 reaction 



Cow's 



\ Lactalbumin |. 

 J Caseinogcn ^. 

 I Lactalbumin |. 

 Difference in J Human — small flocculi. 

 curds \ Cow's — heavy curds. 



Human — amphoteric. 

 Cow's — amphoteric, but more 

 nearly acid. 



Testes. 



Vas deferens. 



Seminal vesicles. 



Ejaculatorj'' ducts. 



The scrotum. 



Spermatic cords. 



The penis. 



The urethra. 



The prostate gland. 



Cowper glands. 



