38 



PROTOZOA 



transmit the organisms. The blood of a malarial patient containing 

 gametocytes is sucked up into the alimentary canal of the mosquito 

 where the gametocytes produce matured macrogametocytes (egg) 



Some may be taken 

 into the stomach 

 of the niosquitowhen 

 it bites 



luman 



Development of 

 Parasite in 



6: 



InSalivary Development 

 Gland 

 (SffTlosq. 



in the 



rPosc^uito 



'/ /In Body 



' L Cavity of moscj. 



'^^oscj. Storo2^^^ 



Fig. i6. Life history of tiie malarial organism. (After Kellogg and Doane. Courtesy 



of Henry Holt & Co.) 



and flagellated microgametocytes (sperm) which conjugate and form 

 a zygote or ookinete which grows into a multicellular somatella or 

 sporoblast in a cyst in the wall of the stomach. This cyst liberates 



