Which of the following are true functional characteristics of humans or other complex life forms?

1. The reproductive system works independently of all other sytems


2. the digetive systems breaks down food to simple molecules for distribution to al body cells


3. Distribution of tasks to different organ systems creates true independence of all body cells


4. The external boundary is a limiting membrane that encloses its contentsWhich of the following are true functional characteristics of humans or other complex life forms?
2, email if u want the detailsWhich of the following are true functional characteristics of humans or other complex life forms?
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Systems don't work independently, pretty much everything is controlled by the brain except your heart beats by itself even if it is taken out of the body.
either 2 or 3 they both sound right : /