Our bodies are made up of many complex _______ that work both individually and together to keep us alive and healthy. Some systems are responsible for delivering nutrients and _________ throughout our bodies, while other systems help remove ________ and harmful substances. One system, called the ________ helps balance levels of __________ and salts in our bodies. The excretory system is made of only a few ________ , but they play a major role in keeping a human body ________ The drag and drop answer here filter blood to remove unnecessary molecules and regulate ___________, or levels of water, in our bodies. These wastes are sent through the here to the ________, where wastes are stored until they are released from the body.
a) organs, oxygen, hydration, kidneys, water, systems, healthy, excretory system, ureters, waste, bladder
b) systems, water, waste, excretory system, oxygen, kidneys, healthy, organs, hydration, ureters, bladder
c) hydration, organs, systems, excretory system, water, oxygen, healthy, bladder, waste, kidneys, ureters
d) waste, organs, systems, bladder, hydration, oxygen, kidneys, excretory system, ureters, water, healthy