52 



'O + n KL\ OF BLOOD. 



The clear spaces between the corpuscles is filled with the 

 liquid part of the blood, called the Plasma. 



Our blood is very much like that of the frog, as we shall 

 see a little later. 



r. PIGMENT 



CELLS 



ARTERY 

 Fig. 16. Part of Frog's Web (low magnifying power). 



