Human Body Systems Relationship to Cell Organelles 7th Grade

The nervous system is like the ________, it controls all other activities and functions.

The digestive system is like the _________, it absorbs nutrients to supply needed energy.

The excretory system is like the ____ ______, it removes waste. 

The respiratory system is like the ____ _____, it takes in needed material and lets waste out.

The circulatory system is like the ____________ , because it transports needed materials.

The skeletal system is like the _____ _____, it provides protection, structure and support.