TRANSITIOX TO ANAEROBIOSIS 



141 



ed briefly. In echinoclerm eggs, or in small animals, like 

 protozoa, planarians, etc., the surface/volume ratio is 

 high enough to allow a rapid diffusion of oxygen to 

 those parts of the body that are not in direct contact with 

 the atmosphere. In other cases, like that of the jellyfish, 

 the animal may be fairly large, but, since it contains 

 very little organic material (its body consisting of such 



TABLE 18 



Examples of Oxygen Consumption at Vaeious Oxygen Tensions in 



Organisms Whose Respiration Is Dependent 



ON THE Tension. 



1) No values at higher tensions are available; the oxygen consumption 

 at 116.8 mm. is therefore taken as 100%. 



