Everyone must eat to receive nutrients necessary for life functions. Molecules from food must be broken down into usable forms and then distributed to all the organs, tissues, and cels of the body. Which two body systems are most important in breaking down food and distributing nutrients throughout the body? a
Repiratory System and Nervous System
b
Respiratory System and Excretory System
c
Circulatory System and Digestive System
d
Respiratory System and Circulatory System