Course Introduction: Anatomy & Physiology I

This course provides a comprehensive introduction to the structure and function of the human body, focusing on the foundational principles of anatomy and physiology. Students will explore the organization of the body, basic chemistry relevant to biological systems, cell structure and function, tissues, and the skeletal and muscular systems. The course also emphasizes the integration of body systems and the physiological mechanisms that maintain homeostasis.

Course Objectives

• Define the basic structural and functional units of the human body.

• Analyze the organization of cells, tissues, and organ systems.

• Explain the physiological processes that sustain life.

• Identify the anatomical features and functions of major body systems.

• Apply anatomical and physiological knowledge to health and disease contexts.

Foundational Topics in Anatomy & Physiology

Chapter 1: The Human Body – An Orientation

This chapter introduces the language and organization of anatomy and physiology, providing the basis for understanding the human body’s structure and function.

• Anatomical Terms: Standardized terms used to describe locations and directions on the body (e.g., anterior, posterior, superior, inferior).

• Body Cavities: Major spaces within the body that house organs, such as the cranial, thoracic, and abdominopelvic cavities.

• Levels of Organization: The human body is organized hierarchically: chemical → cellular → tissue → organ → organ system → organism.

• Homeostasis: The maintenance of a stable internal environment despite external changes.

• Major Organ Systems: Examples include the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems.

Chapter 2: Basic Chemistry

This chapter covers the chemical principles essential for understanding biological processes in the human body.

• Atoms and Molecules: Atoms are the smallest units of matter; molecules are combinations of atoms.

• Elements and Compounds: Elements are pure substances; compounds are combinations of two or more elements.

• Water and Its Importance: Water is the most abundant compound in the body and is vital for chemical reactions and temperature regulation.

• Organic Molecules: Include carbohydrates, lipids, proteins, and nucleic acids. Each plays a specific role in cell structure and function.

• pH and Buffers: pH measures the acidity or alkalinity of a solution. Buffers help maintain stable pH in body fluids.

  • Formula:

Chapter 3: Cells and Tissues (Part I: Cells)

This chapter explores the cell as the basic unit of life, its structure, and its functions.

• Cell Theory: All living things are composed of cells; cells are the basic units of structure and function; all cells arise from pre-existing cells.

• Cell Organelles: Specialized structures within cells, such as the nucleus, mitochondria, ribosomes, and endoplasmic reticulum, each with distinct functions.

• DNA and Protein Synthesis: DNA contains genetic information; protein synthesis occurs via transcription and translation.

• Cell Division: Mitosis (somatic cell division) and meiosis (gamete formation).

Chapter 3: Cells and Tissues (Part II: Tissues)

This section classifies the four basic tissue types and their roles in the body.

• Epithelial Tissue: Covers body surfaces and lines cavities; functions in protection, absorption, and secretion.

• Connective Tissue: Supports, binds, and protects other tissues; includes bone, cartilage, blood, and adipose tissue.

• Muscle Tissue: Responsible for movement; types include skeletal, cardiac, and smooth muscle.

• Nervous Tissue: Conducts electrical impulses; composed of neurons and supporting cells.

Chapter 4: Skin and Body Membranes

This chapter examines the structure and function of the skin and associated membranes.

• Skin Layers: Epidermis (outer), dermis (middle), and hypodermis (deepest).

• Functions of the Skin: Protection, temperature regulation, sensation, excretion, and vitamin D synthesis.

• Body Membranes: Include cutaneous, mucous, serous, and synovial membranes.

• Accessory Structures: Hair, nails, and glands (sebaceous and sweat glands).

Chapter 5: The Skeletal System

This chapter details the structure, function, and classification of bones and joints.

• Functions of the Skeleton: Support, protection, movement, mineral storage, and blood cell formation.

• Bone Structure: Compact and spongy bone, bone marrow, periosteum, and endosteum.

• Bone Growth and Remodeling: Ossification processes and the role of osteoblasts and osteoclasts.

• Classification of Bones: Long, short, flat, irregular, and sesamoid bones.

• Joints: Articulations between bones; classified as fibrous, cartilaginous, or synovial joints.

Chapter 6: The Muscular System

This chapter explores the anatomy and physiology of muscle tissue and the mechanisms of muscle contraction.

• Types of Muscle Tissue: Skeletal (voluntary), cardiac (involuntary), and smooth (involuntary).

• Muscle Structure: Muscle fibers, myofibrils, sarcomeres, and connective tissue coverings.

• Muscle Contraction: Sliding filament theory; role of actin, myosin, calcium ions, and ATP.

  • Formula: (general physics, relevant to muscle force)

• Neuromuscular Junction: Site where a motor neuron stimulates a muscle fiber.

• Muscle Disorders: Examples include muscular dystrophy and myasthenia gravis.

Chapter 7: The Nervous System

This chapter introduces the organization and function of the nervous system.

• Divisions: Central nervous system (CNS: brain and spinal cord) and peripheral nervous system (PNS: nerves and ganglia).

• Neurons: Basic functional units; transmit electrical impulses.

• Neuroglia: Supporting cells that protect and assist neurons.

• Reflex Arcs: Simple neural pathways mediating reflex actions.

• Major Brain Regions: Cerebrum, cerebellum, brainstem, diencephalon.

Sample Table: Classification of Tissues

Assessment and Grading

• Attendance and Participation: 10% each

• Assignments and Quizzes: 20% (10% each)

• Exams: Midterm (15%), Exam 2 (15%), Final Exam (15%)

• Mastering A&P Assignments: 20%

Study Tips

• Review key terms and definitions regularly.

• Use diagrams and tables to visualize structures and processes.

• Form study groups for discussion and clarification of complex topics.

• Practice applying concepts to clinical scenarios and case studies.

Additional info: The above content is synthesized from the course syllabus and weekly objectives, expanded with standard academic context for Anatomy & Physiology I. For detailed study, refer to the recommended textbook: Marieb, E.N. (2021). Essentials of Human Anatomy and Physiology (13th ed.).