Anatomy studies the structure of body parts, while physiology focuses on their functions. The human body is organized from the chemical level to the organismal level. Major systems include the integumentary, skeletal, muscular, nervous, cardiovascular, lymphatic, respiratory, digestive, urinary, endocrine, and reproductive systems, each with specific structures and functions. Homeostasis maintains internal stability through feedback loops. Key concepts include system interactions and clinical relevance. Effective study involves understanding terminology, using visual aids, active learning, regular review, and utilizing resources like textbooks, online platforms, and labs. Engaging with the material is essential for a strong foundational understanding.