Basic Anatomy for Everyone

Lesson 1 • Anatomical Terminology and Language

Introduces standard anatomical terms used to describe position, direction, and movement. Precise language prevents misidentification of structures throughout the course.

Lesson 2 • Body Cavities and Regions

Maps the major body cavities and their protective membranes, plus abdominal quadrants and regions. Locating organs within cavities is a core clinical skill.

Lesson 3 • Body Planes and Sections

Defines the three primary anatomical planes and how sections reveal internal structures. Understanding planes is essential for interpreting diagrams and imaging.

Lesson 4 • Levels of Biological Organization

Covers the hierarchy from atoms to organ systems, showing how complexity builds upward. Provides the conceptual scaffold for all subsequent anatomical study.

Lesson 1 • Cell Structure and Organelles

Details the plasma membrane, nucleus, and cytoplasmic organelles and their roles. Cell structure is the microscopic foundation for understanding tissue and organ function.

Lesson 2 • Connective Tissue Types

Surveys loose, dense, cartilage, bone, and blood as connective tissue subtypes. Connective tissue supports, binds, and protects all other tissues.

Lesson 3 • Muscle and Nervous Tissue

Distinguishes skeletal, cardiac, and smooth muscle and introduces nervous tissue components. These excitable tissues drive movement and communication between body parts.

Lesson 4 • Cell Transport Mechanisms

Covers passive and active transport processes that move substances across membranes. Transport mechanisms explain nutrient uptake, waste removal, and nerve signaling.

Lesson 1 • Bone Formation and Remodeling

Explains ossification, growth at epiphyseal plates, and continuous remodeling by osteoblasts and osteoclasts. Remodeling links skeletal health to nutrition and hormones.

Lesson 2 • Appendicular Skeleton

Covers the pectoral and pelvic girdles and the bones of the upper and lower limbs. The appendicular skeleton enables locomotion and manipulation of objects.

Lesson 3 • Bone Structure and Classification

Describes gross and microscopic bone anatomy and classifies bones by shape. Bone structure determines mechanical strength and metabolic roles.

Lesson 4 • Joints and Their Movements

Classifies joints by structure and function and names the movements each joint type permits. Joint anatomy directly predicts range of motion and injury patterns.

Lesson 1 • Lower Limb Muscles

Maps gluteal, thigh, leg, and foot muscles and their roles in walking and balance. Lower limb muscle knowledge is essential for understanding gait and injury.

Lesson 2 • Head and Neck Muscles

Names muscles of facial expression, mastication, and neck movement with their actions. These muscles are relevant to speech, eating, and head positioning.

Lesson 3 • Trunk and Upper Limb Muscles

Identifies muscles of the thorax, abdomen, back, shoulder, and arm with their functions. Trunk muscles stabilize the spine; upper limb muscles enable fine motor tasks.

Lesson 4 • Muscle Contraction Physiology

Covers the action potential, calcium release, cross-bridge cycling, and relaxation. Understanding contraction physiology connects muscle anatomy to clinical conditions.

Lesson 1 • Brain Anatomy and Function

Identifies the cerebrum, cerebellum, brainstem, and diencephalon with their primary functions. Brain anatomy links structure to cognition, sensation, and motor control.

Lesson 2 • Nervous System Organization

Divides the nervous system into central and peripheral divisions and their functional subdivisions. This organizational map guides all subsequent neural anatomy study.

Lesson 3 • Cranial and Spinal Nerves

Names the 12 cranial nerves and their functions and outlines spinal nerve plexuses. Peripheral nerve distribution explains sensory and motor deficits in injury.

Lesson 4 • Neuron Structure and Signaling

Details neuron anatomy, resting membrane potential, and action potential propagation. Neuron signaling is the cellular basis of sensation, thought, and movement.

Lesson 1 • Blood Composition and Function

Describes plasma, erythrocytes, leukocytes, and platelets and their physiological roles. Blood composition links the cardiovascular system to immunity and hemostasis.

Lesson 2 • Blood Vessels and Circulation

Compares artery, vein, and capillary structure and traces pulmonary and systemic circuits. Vessel structure determines blood pressure, flow rate, and exchange capacity.

Lesson 3 • Gas Exchange and Breathing Mechanics

Explains alveolar gas exchange by diffusion and the pressure changes that drive breathing. Mechanics of ventilation connect respiratory anatomy to physiology.

Lesson 4 • Heart Anatomy and Chambers

Identifies the four chambers, valves, and wall layers of the heart and their roles. Heart anatomy determines the direction and pressure of blood flow.

Lesson 1 • Urinary System Anatomy

Identifies kidneys, ureters, bladder, and urethra and the nephron as the functional unit. Kidney structure explains filtration, reabsorption, and urine concentration.

Lesson 2 • Endocrine Glands and Hormones

Maps major endocrine glands, their hormones, and target organs for systemic regulation. Hormonal control integrates multiple organ systems into coordinated responses.

Lesson 3 • Fluid Balance and Waste Elimination

Explains how kidneys and hormones regulate fluid volume, electrolytes, and acid-base balance. Waste elimination maintains the internal environment essential for cell survival.

Lesson 4 • Accessory Digestive Organs

Covers the liver, gallbladder, and pancreas and their secretions that aid digestion. Accessory organ dysfunction directly impairs nutrient processing.

Lesson 1 • Lymphatic System and Immunity

Describes lymphatic vessels, nodes, spleen, thymus, and tonsils and their immune roles. The lymphatic system drains interstitial fluid and mounts defenses against pathogens.

Lesson 2 • Integumentary System Structure

Details epidermis, dermis, and hypodermis layers plus hair, nails, and glands. Skin is the body's primary physical barrier and a sensory and thermoregulatory organ.

Lesson 3 • Male Reproductive Anatomy

Identifies testes, ducts, accessory glands, and external genitalia with their reproductive roles. Structural knowledge supports understanding of sperm production and delivery.

Lesson 4 • Skin Functions and Clinical Relevance

Connects skin structure to protection, thermoregulation, vitamin D synthesis, and sensation. Clinical assessment of skin reveals systemic health status and local pathology.