This is an excellent site, maybe not for living environment, but perhaps AP biology, health, anatomy and physiology etc... You could use these scenarios as do nows, exit slips, exam questions, or in class discussions. AWESOME!
I love BBC in general but this is a great site for exploring the interaction between the skeletal, muscular, and nervous systems. It is one thing to learn about them individually, however, when you get to experience how they work together it enhances your understanding. I would use this as a culmination series of lessons after having taught all 3 systems first.