If you like visuals, Crash Course has an entertaining and informative Biology playlist which includes a subset on human biology. I would imagine any undergrad (or possibly even high school) introductory text would also revise major organ systems to the level you describe.
Do you have any specific purpose or goal in mind?
I have two primary motivations. First, I'd like to have a better context for understanding new medical treatments that I hear about. Second, I'd like to know enough about basic human biology that my first response when someone tells me about a medical problem they're having is sympathy rather than a desire to learn what that part of the body does (my curiosity is usually followed by frustration when the person who is complaining of some organ failing doesn't even know what the organ is supposed to do when healthy and frustration is a particularly bad respo...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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