MICROSCOPIC STUDY OF CORPUSCLES. 53- 



. Pour a small quantity of defibrinated blood 

 into a glass bottle. Describe its color. 



. Stopper the bottle tightly and shake it vio- 

 lently for a minute or two. 



a. What change has taken place in the 



appearance of the blood? 



b. With what was the blood mixed dur- 



ing the process of shaking? 



c. In the human body where does this 



change take place? 



26. MICROSCOPIC STUDY OF CORPUSCLES. 



(Dem.) 



Materials- Prepared slides of frog's blood and of human blood; 

 compound microscope (500 diameters) 



A. Corpuscles of frog's blood. 



1. How many distinct types of solid bodies 



(corpuscles) can you see in the frog's 

 blood? 



2. Is there any variation in the form or size of 



different corpuscles of the same type? 



3. Draw two corpuscles (differing as much as 



possible) of each type, much enlarged, 

 labelling nucleus and cell-body. 



B. Corpuscles of human blood. 



1. What is the form of the corpuscles in hu- 



man blood? (Examine several corpus- 

 cles before deciding.) 



2. In what respects do these corpuscles differ 



from those found in frog's blood? 



i 



