264 BIOLOGY FOR BEGINNERS 



4. Excretory system 



Kidneys, and their ducts (ureters), bladder 

 Lungs, and skin 



5. Nervous system 



Brain: consisting of 



Olfactory lobes 



Cerebrum 



Optic lobes 



Cerebellum 



Medulla 



Spinal cord and nerves 

 Sense organs, eye, ear, etc. 



6. Supporting system 



Skeleton, bone, and cartilage; ligaments 

 Connective tissue 



7. Muscular system 



Body muscles, tendons 



Muscles of internal organs, heart, intestines, etc. 



8. Reproductive system 



Ovaries and oviducts 

 Spermaries and sperm ducts 



COLLATERAL READING 



General Structure: Economic Zoology, Kellogg and Doane, pp. 1-13; 

 Economic Zoology, Osborne, pp. 356-374; Biology of the Frog, Holmes, 

 entire; Types of Animal Life, Mivart, pp. 96-122; Forms of Animal Life, 

 Rolleston, pp. 74-81; Winners in Life's Race, Buckley, pp. 70-88; Rep- 

 tiles and Birds, Figuier, pp. 17-33; The Animal World, Vincent, p. 25; 

 Textbook of Biology, Peabody and Hunt, pp. 101-119; The Frog Book. 

 Dickerson, pp. 171-185; U. S. Fish Commission Report, 1897, pp. 251-261; 

 Zoology Textbook, Davenport, pp. 325-348; Familiar Life t Matthews, 

 pp. 1-56; Talk about Animals, pp. 151-154, 160-164; Wilderness Ways, 

 Long, pp. 75-87; General Zoologv, Colton, pp. 181-195; Zoology Textbook, 

 Linville and Kelly, pp. 327-347. ' 



SUMMARY 

 Amphibia (two lives). 



Characteristics: metamorphosis direct fertilization 



no scales larva vegetarian 



three-celled heart adult carnivorous 



fairly developed brain 



