This comprehensive TED-Ed companion resource explores how oxygen travels through the human body, revealing the remarkable coordination between the digestive, respiratory, circulatory, nervous, skeletal, and endocrine systems. Designed for high school and introductory college biology or anatomy courses, this resource encourages systems-level thinking, critical analysis, and evidence-based writing. What’s included: 20 rigorous discussion questionsAn expanded, multi-part essay promptA fully scaffol