DESIGN IN NATURE 285 



I find in him a complex alimentary canal, for the 

 reception and digestion of food, connected with which 

 are various complex glands which secrete from the 

 blood peculiar juices that are capable of preparing 

 the food to enter the blood. 



I see all these organs working in perfect harmony, 

 both by mechanical means and by the wonderful 

 chemical processes of digestion, to prepare the food 

 for the nourishment of the body. 



I follow the digested food through certain organs 

 which help to prepare it, into the blood. Then I see 

 the heart, a double force-pump of wonderful struc- 

 ture, pump this life-giving blood through a most 

 intricate system of channels into every part of the 

 body, in order that every nerve, and fiber, and cell 

 may renew its life. I see each separate tissue take 

 from the blood, as if by instinct, just what it needs to 

 renew itself, and nothing more, and transform it into 

 new living tissue like itself. I see the blood gather 

 and carry from all parts of the body the worn-out 

 tissues that have been rendered useless by dqing their 

 work, and carry them to the lungs, kidneys, and skin, 

 in which complicated organs the waste materials that 

 would soon poison the body to death are removed 

 from the blood and cast into the external world. 



I see the lungs constantly at work pumping out 

 deadly materials and pumping in oxygen to be used in 

 liberating heat and other forms of energy for the use 

 of the body. 



I see the brain, an organ of most delicate and com- 

 plex structure, connected with its intricate system of 

 nerves, with their countless fibers, extending, like a 

 system of telegraph wires, to every part of the body. 



I see the various organs which compose his ex- 

 tremely complex body performing their numerous 

 functions in perfect harmony. Each organ knows 



