AND PERSONALITY 



weighed 272 pounds. The brain that directed that mecha- 

 nism weighed only 42.11 grams. The contrasting behavior 

 characteristics of the ostrich and the antelope were strik- 

 ingly illustrated by the fact that the brain of a 295-pound 

 kongoni that we collected the same day weighed 275 grams. 

 The brain of the ostrich consisted almost entirely of the 

 optic and auditory lobes and thalamus. There was only 

 slight development of the olfactory lobe and of the associa- 

 tion centers, whereas the auditory and olfactory areas as 

 well as the optic and association centers in the kongoni are 

 well developed. Since the ostrich is eye-controlled, it is not 

 surprising that a single eye weighed more than the brain 

 or that the two eyes were equal in weight to the eyes of 

 a zebra, whose body weight was twice that of the ostrich. 



The long, stringlike adrenal glands of the ostrich followed 

 the pattern of the adrenal glands found in the crocodile 

 and the alligator. The thyroid gland of the ostrich, dumb- 

 bell in form, located in the chest, was similar in pattern 

 and position to the thyroid gland of the crocodile and the 

 alligator. 



The lungs of the ostrich were adherent to the rib, which 

 is the bird pattern; hence flapping of the wings when the 

 ostrich runs is an aid to respiration. Were the ostrich 

 equipped in energy to lift himself in flight, he would be 

 overcome by heatstroke. 



Birds and their cousins the reptiles provide clear-cut 

 examples of the differing influences of the warm-blooded 

 and the cold-blooded state with respect to the size of the 

 brain, the heart, and the thyroid and the adrenal glands. 



Let us compare an ostrich that weighed 272 pounds with 

 a crocodile that weighed 295 pounds, bearing in mind the 

 fact that about 75 per cent of the food intake of warm- 

 blooded animals is used to maintain the warm-blooded 

 state and, as a corollary, the fact that the actual energy of 

 a warm-blooded animal is used for maintaining the warm- 

 blooded state rather than for the work of running, fighting, 



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