INFANCY IN MAN 



301 



•V. y. Zoological Sac. 



N. y. Zoological Soc. 



baby does not begin to walk for a 

 vear or more. Generally, we find 

 that the higher the species the longer 

 the infant depends on its parents for 

 protection and nourishment. 



Infancy in man. In man, protection of the young is shown in 

 the highest degree. Not only is there a long period of dependence 

 of the baby upon the nourishment obtained from the mother's 

 body before birth, but there is a long period of suckling after birth. 

 The greatest care and protection are given the young during its 

 infancy and childhood. As communities become more prosperous, 

 there is a tendency on the part of the parent to postpone for each 

 child the assumption of individual responsibilities. 



Among the different races of mankind, and even among diiTerent 

 peoples of the same race, there is a great deal of variation with 



A'. Y. Zooli/yuill S<n 



Note the length of infancy given in the table on the following page. 



