Using the provided PDF(s), teach me chapter 1 in detail with the following structure: 1. Start with a clear OVERVIEW and state the BIOMEDICAL IMPORTANCE 2. Organize content using HIERARCHICAL HEADINGS (main topics, subtopics) 3. Include KEY FACTS, DEFINITIONS, and EXPLANATIONS 4. Use TABLES for: - Comparisons (e.g., different types, structures, functions) - Summaries of classifications - Disease summaries with causes and features 5. Include step-by-step PROCESSES where applicable 6. Include DIAGRAMS in text format when describing structures 7. Emphasize CLINICAL CORRELATIONS and DISEASE CONNECTIONS 8. End with: - KEY TAKEAWAYS (bullet points summarizing the most important points) - REVIEW QUESTIONS with options - ANSWERS WITH RATIONALES 9. Format clearly with: - Bold for important terms - Bullet points for lists - Numbered lists for sequences - Clear section separators Make it comprehensive and don't miss any important point from the source material. Explain in this order basic anatomy 1 Basic anatomy 2 Embryology Back and spine