FORMS OF CELLS 



9 



it is broader and has the power of shortening itself so 

 as to aid in pulling the bones about. In other words, the 



dialed epithelial cells 



Bone cells 



Connective tissue cells, 

 lastic fibrous tissue 

 Sensory nerve cell of spinal cord 



flat epjthelial 

 cells (frog skin) 



Motor nerve cell of 

 'spinal cord 



Connective tissue - 



FIG. 6. Various forms of cells found in the body. 



forms of the various cells are as numerous as their posi- 

 tions and functions in the body. 



Nutrition of cells. Instead of having the power of 

 independent movement which was necessitated by the 

 ameba's constant search for food suitable to its needs, 

 the cells in the animal body remain relatively stationary, 

 with the exception of the red and white cells of the blood. 

 The stationary cells have food and oxygen prepared for 

 their use and brought to them by the blood through an 

 intricate system of canals, the blood-vessels. The waste 

 products of their activity are borne away without effort 

 on their part by this same blood supply, which bathes 

 all the tissues of the body. 



DEMONSTRATION 



Demonstrate under the microscope the ameba as found in the 

 slime from stagnant pond water. 



