PR     CO      GR        AD
TABLE 15-10
Summary of the development of immunity in				animals.	(Modified from Stiws, CaldiveiL and Fa			ět 1980.)	
		Immunologic				Non-	Phagocytic		
		Specificity	Immuno-			specific	Ameboid	Leukocyte	
	Graft	of Graft	logic	Phago-	Encapsu-	Humoral	Co clo mo-	Differen-	Anti-
	Rejection	Rejection	Memory	cytosis	lation	Factors	cytes	tiation	bodies
Protozoans	Yes	No	No	Yes	No	No	No	No	No
Poriferans	Ycs	Yes	Yes	No	Yes	No	No	No	No
Cnidarians	Yes	Yes	Yes	No	Yes	No	No	No	No
Annelids	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Probable	No
Mollusks	Yes	'>	*	Yes	Yes	Yes	Yes	No	No
Arthropods	Yes	<>	?	Yes	Yes	Yes	Yes	No	No
Ech i nod c r m s	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Tuiiicates	Yes	Probable	Yes	Yes	Yes	Yes	Yes	Yes	No
Vertebrates	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes