Organs and Classification of Animals. J 



dissection to have a thin sheet of cork weighted with 

 lead, so as to retain its position at the bottom of the 

 fluid, upon which the various parts may be p nned 

 down. To preserve animal organs the best materials 

 are, spirits of wine, or a weak (2 per cent. ) solution of 

 bichromate of potassium. 



The study of the forms and nature of organs, and 



FIG. 3. 



Common orange Star-fish (Asteracanthion anrantiacus). 



their relations to each other and to the organism in 

 general, and the laws deduced therefrom, is known as 

 Morphology ; the study of the uses of parts is called 

 Physiology. 



Morphology. The component organs of an animal's 

 body are disposed around an imaginary axis passing 



