570 LIST OF VISUAL AIDS 



Digestion (MP, UWF, 2 parts). Part 1 (15 min). Mechanical and muscular processes 

 involved in the digestion of food. Part 2 (18 min). Chemical changes involved in 

 the digestion of carbohydrates, proteins, and fats; secretion and action of saliva, 

 gastric, pancreatic, intestinal juices, and bile on each type of food. 



Elimination (MP, UWF, 12 min). A study of the human body's methods of elimina- 

 tion — through the skin, kidneys, lungs, and colon. 



Endocrine Glands (MP, EBF, 11 min). Points out the effects of improper functioning 

 of the endocrine glands, and the causes and remedies of faulty glandular action. 



The Earth's Rocky Crust (MP, EBF, 10 min). Dynamic aspects of geology, including 

 the formation and destruction of rocks and land forms, illustrative of the content of 

 chapter XXV. 



The Earthworm. (MP, UWF, 11 min). Study of an animal organized on a simple 

 organ-system plan, skillfully dissected to show its structure, and with included 

 material on its role in aeration and enrichment of the soil, and its reproductive mechan- 

 isms and behavior. 



Fingers and Thumbs (MP, Lib F, 20 min). Traces the development of man's hands 

 from prehuman stages to the present. Produced under the supervision of Julian 

 Huxley. 



Heredity (MP, EBF, 11 min). Presents by animated charts and animal picturization 

 the Mendelian laws of inheritance. 



Heredity and Prenatal Development (MP, McGraw, 21 min). Step-by-step picturiza- 

 tion of growth, subdivision, and union of male and female sex cells, including explana- 

 tion of chromosomes and genes. 



Heredity Variations in Coleus (MP, OSU, 11 min). Photographic record of experi- 

 ments conducted over a period of time showing the variety of offspring derived from 

 the coleus plant. 



How Animals Defend Themselves (MP, YAF, 10 min). Adaptations for protection, 

 including speed and agility, armor, defensive weapons, camouflage, and mimicry. 



How Seeds Germinate (MP, USDA, 9 min, silent). Through time-lapse photography, 

 shows the germination of crimson clover and spring vetch over a period of a week. 



How the Organs of the Body Function (MP, Bray, 30 min). Presents the important 

 organs of the body; visualizes the structure of the body by X-rays; and shows the 

 contraction of muscles, movement of bones and joints, and action of heart and lungs. 

 Condensed version of a series entitled "The Human Body" consisting of silent films 

 with following titles: 



Human Skeleton (38 min) 



Circulatory System (30 min) 



Respiratory System (15 min) 



Digestive Tract (22 min) 



Urinary System (15 min) 



Human Development (22 min) 



Human Reproduction (MP, McGraw, 20 min). Describes the human reproductive 

 system and the process of normal human birth; the anatomy and physiology of male 

 and female reproductive organs; and the process of ovulation, fertilization, and 

 development of the human embryo. Supplementary filmstrip, same title, also available. 



The Hydra (MP, UWF, 10 min). The general structure and behavior of Hydra, 

 and the functioning of its parts. 



In the Beginning (MP, USDA, 17 min). Portrays the ovulation, fertilization, and 

 early development of the mammalian egg. 



Kidneys, Ureters, and Bladder (MP, Bray, 11 min). Description by animated draw- 

 ings of the important anatomical features of the kidneys, ureters, and urinary bladder; 

 relationship of constituent parts of the urinary system ; and the process of elimination. 



