PART8 OF A TLA NT 



41 



root hairs of an oat plant highly magnified. Water 

 easily passes through the walls of the root hairs, and 

 from them passes on into the main roots, and finally 

 into the plant stem. Each root hair 

 is like a miniature well, through 

 which water rises into the main 

 roots of the plant. When a grow- 

 ing plant is taken from the soil 



?. — You n u' radii h 

 plain : A. young plant sprout- 

 ed Rs 



111. III. 



pullM from llu- soil. 



Hal tlniwiiiKs from photo- 



KIk. s.— Ho«>t hair* 

 <\ plant 111:11:111- 



bo« - 

 I boII pkrtirln 



D B illssolv 

 .1' t In- r-< 



iKnun Sju-lirv'* Kxp. 

 I I'll. 11 /• n. 



and replanted it nearly always wilts, taking several 

 days to revive. It wilts because many of its root hairs 

 axe destroyed, and coneegnently supply is les- 



In time now root hair- are formed and the plant 

 revives. 



Roots arc useful to plants in two ways: First, they 



