762 THE PLACENTA. 



the placental circulation. These effects may be manifested either in the 

 general atrophy and death of the foetus, or in the imperfect develop- 

 ment of particular parts ; just as in the adult a morbid action may ope- 

 rate upon the entire system, or may show itself in some one organ, which 

 is more particularly sensitive to its influence. 



