Which body systems sends and receives messages to all parts of the body?
Nervous system
Which body system (AND which organ in that system) is the most complex in the human body?
Nervous system / Brain
Explain how the digestive system and the circulatory system work together.
The digestive system breaks down food to get nutrients. The circulatory system takes those nutrients throughout the body.
Which choice describes your body's ability to maintain a balanced internal condition (through changes like sweating to cool off and increased heart rate to pump more oxygen through the body)? (A) homeostasis (B) growth (C) digestion
(A) homeostasis
