GROWIH rv 5IZE ANT) BODY : . . . . _ N5 IS" FaSM aXINIaLS 



327 



level feeding period. McCay et al. { 19S5 

 nile period could be pre ' — r ^ — - - 

 that grov\-th toward ad' '- 



the length of life dep.^ .. 



McCanc-e and Widdowson l-5c 

 pigs could be advanced by higher 

 been kept at low body weigh: : : :_ 

 of these species are bom at an earh" stage 

 yet to be determined wiiether specie ? : ~ 

 ment such as catde or sheep, behave : : 



7 afff 



ot ae\-e 



that in rats the jn\-e- 



~ " mutriticrL and 



r.'Tig at any tune. 



_.e pj\-enile period. 



iterrupted growdi of 



the young pigs had 



undernutrition. Both 



:_ and it has 



ter stage ot de\"elop- 



f ^vav. After rsrriods 



10 



20 



50 100 200 500 



Weight of foetus cgm.) 



5,000 



45 



50 



rj 



Ago of foetus davs) 



< » I I — 

 UV- 120 147 



— Birth - 



Figure 6. Gro\\-th of muscle tissue in fetal sheep. At first, up to Ae age of 90 to 100 

 da\-:?, the muscle fiber grows by ceU div^^ :hat is, increase in the number of celk. 



-\fter 100 d.i\-s there is a marked increase ::. :-. .-.ze of the cells. Joubert. 1955.) 



