Anatomy and Physiology 2

Chapter 1 The Endocrine System
1.1. Introduction
1.2. The Dual Systems of Regulation: Endocrine versus Nervous Communication
1.3. Mechanisms of Intercellular Communication
1.3.1. Direct and Paracrine Communication
1.3.2. Endocrine, Neural, and Autocrine Signaling
1.4. Classification and Action of Hormones
1.4.1. Amine and Peptide Hormones
1.4.2. Lipid Derivatives
1.5. Molecular Mechanisms of Hormone Action
1.5.1. Intracellular Receptors and Gene Expression
1.5.2. Cell-Membrane Receptors and Second Messengers
1.5.3. The Cyclic Adenosine Monophosphate System
1.5.4. The PIP2 and Calcium Signaling Pathway
1.6. Regulation of Hormone Secretion
1.6.1. Types of Endocrine Stimuli
1.6.2. Feedback Loops and Homeostasis
1.7. Hormone Interactions at the Target Tissue
1.8. The Hypothalamus and the Pituitary Gland
1.8.1. The Hypothalamus: The Neuroendocrine Bridge
1.8.2. The Posterior Pituitary (Neurohypophysis)
1.8.3. The Anterior Pituitary (Adenohypophysis)
1.9. The Thyroid Gland: Metabolism and Growth
1.9.1. Thyroid Follicles and the Synthesis of T3/T4
1.9.2. Parafollicular Cells and Calcitonin
1.10. The Parathyroid Glands and Calcium Homeostasis
1.11. The Adrenal Glands: Stress Response and Fluid Balance
1.11.1. The Adrenal Cortex and Steroid Production
1.11.2. The Adrenal Medulla and the Acute Stress Response
1.12. The Pancreas: Regulation of Blood Glucose
1.12.1. The Pancreatic Islets
1.13. The Pineal Gland and Circadian Rhythms
1.14. Secondary Endocrine Organs
1.15. Development and Aging of the Endocrine System
1.16. Clinical Pathophysiology and Common Endocrine Disorders
1.16.1. Pituitary and Adrenal Pathologies
1.16.2. Thyroid and Pancreatic Pathologies
1.17. Environmental Toxicology: Endocrine-Disrupting Chemicals
1.18. Nursing Assessment and Clinical Pearls
1.19. Self-Assessment: Multiple-Choice Questions
1.20. Answer Key and Explanation
References

Chapter 2 Blood and Hemostasis
2.1. Functional Anatomy and Classification of Blood as a Specialized Tissue
2.2. Physical and Chemical Characteristics of Whole Blood
2.3. Composition and Physiology of Blood Plasma
2.3.1. The Role of Plasma Electrolytes and Nutrients
2.3.2. Plasma Proteins and Colloid Osmotic Pressure
2.3.3. Molecular Differentiation: Plasma versus Serum
2.4. Erythrocyte Anatomy: Specialization for Gas Transport
2.4.1. Structural Adaptations and Morphology
2.4.2. Hemoglobin: The Molecular Engine of Respiration
2.4.3. The Erythrocyte Life Cycle: Production and Destruction
2.4.4. Erythropoiesis: The Generation of Red Cells
2.4.5. Hormonal Regulation: Erythropoietin
2.4.6. Destruction and the Heme Degradation Pathway
2.5. Leukocyte Physiology: The Cellular Defense System
2.5.1. Specialized Cellular Behaviors
2.5.2. Granular Leukocytes (Granulocytes)
2.5.3. Agranular Leukocytes (Agranulocytes)
2.6. Thrombocyte Anatomy and the Initiation of Hemostasis
2.6.1. Hemostasis Phase I: Vascular Spasm
2.6.2. Hemostasis Phase II: Platelet Plug Formation
2.6.3. Hemostasis Phase III: The Coagulation Cascade
2.6.4. The Extrinsic and Intrinsic Pathways
2.6.5. The Common Pathway and Fibrin Stabilization
2.7. Immunohematology: The ABO and Rh Blood Group Systems
2.7.1. The ABO System
2.7.2. The Rh System
2.7.3. Erythroblastosis Fetalis: Maternal–Fetal Incompatibility
2.7.4. Prevention with Rh Immune Globulin
2.8. Selected Hematological Disorders and Pathophysiology
2.8.1. Anemias
2.8.2. WBC and Platelet Disorders
2.9. Self-Assessment: Multiple-Choice Questions
2.10. Answer Key
References

Chapter 3 Heart Anatomy and Physiology
3.1. Fundamentals and Orientation of the Heart
3.1.1. Anatomical Positioning and General Dimensions
3.2. Protective Layers and the Heart Wall
3.2.1. The Pericardium
3.2.2. The Three Layers of the Heart Wall
3.3. External Anatomy and Landmark Surfaces3.3.1. Heart Surfaces
3.3.2. External Grooves and Sulci
3.4. Cardiac Chambers and Great Vessels
3.4.1. The Atria: Receiving Chambers
3.4.2. The Ventricles: Pumping Chambers
3.5. Internal Anatomy and Valvular Control
3.5.1. AV Valves
3.5.2. Semilunar Valves
3.5.3. Heart Sounds and Auscultation
3.6. The Cardiac Conduction System
3.6.1. The Myogenic Nature of Heart Contraction
3.6.2. Pacemaker Cells and the Conduction Pathway
3.6.3. Action Potential in Conductive Cells
3.7. The Electrocardiogram
3.8. Pulmonary and Systemic Circulatory Pathways
3.8.1. The Pulmonary Circuit
3.8.2. The Systemic Circuit
3.9. Hemodynamics and the Physics of Blood Flow
3.10. Regulation of Blood Pressure and Cardiac Output
3.10.1. Determinants of Blood Pressure
3.10.2. CO and Stroke Volume
3.11. Coronary Circulation and Myocardial Supply
3.11.1. Coronary Arteries
3.11.2. Cardiac Veins and the Coronary Sinus
3.11.3. Clinical Pathophysiology and Cardiac Dysfunction
3.12. Self-Assessment: Multiple-Choice Questions
3.13. Answer Key and Rationales
References

Chapter 4 The Lymphatic and Immune System: Fluid Homeostasis and Biological Defense
4.1. Fundamentals of the Lymphatic System
4.1.1. Fluid Dynamics and the Origin of Lymph
4.1.2. The One-Way Journey of Lymphatic Vessels
4.2. Microscopic Anatomy: Capillaries and Lacteals
4.2.1. Structure of Lymphatic Capillaries
4.2.2. Specialized Intestinal Capillaries: Lacteals
4.3. Large-Scale Drainage: Trunks and Ducts
4.3.1. The Right Lymphatic Duct
4.3.2. The Thoracic Duct (Left Lymphatic Duct)
4.4. Classification of Lymphatic Tissues and Organs
4.4.1. Functional Classification
4.4.2. Structural Classification
4.5. The Thymus: The School for T-Lymphocytes
4.5.1. Internal Histology: Cortex and Medulla
4.5.2. Epithelioreticular Cells and T-Cell Education
4.6. Lymph Nodes: The Filters of the Lymph
4.6.1. Circulation Through the Node
4.6.2. Internal Functional Zones
4.7. The Spleen: The Filter of the Blood
4.7.1. White Pulp and Red Pulp
4.7.2. Splenic Circulation: Open versus Closed
4.8. Lymphocyte-Mediated Immune Response
4.8.1. Humoral Immunity (B Cells)
4.8.2. Cell-Mediated Immunity (T Cells)
4.9. Self-Assessment: Multiple-Choice Questions
4.10. Answer Key and Rationales
References

Chapter 5 The Respiratory System
5.1. Introduction to Respiratory Dynamics
5.2. Functional Organization: Conducting and Respiratory Zones
5.2.1. The Conducting Zone
5.2.2. The Respiratory Zone
5.3. Anatomy of the Upper Respiratory System
5.3.1. The External Nose and Nasal Vestibule
5.3.2. The Nasal Cavity and Turbinate Dynamics
5.3.3. Sensory Perception and Olfactory Mucosa
5.3.4. Paranasal Sinuses
5.4. The Pharynx: A Shared Passageway
5.4.1. The Nasopharynx
5.4.2. The Oropharynx
5.4.3. The Laryngopharynx
5.5. The Larynx: The Voice Box
5.5.1. The Cartilaginous Framework
5.5.2. Sound Production
5.6. The Trachea and the Bronchial Tree
5.6.1. The Trachea
5.6.2. The Bronchial Tree
5.6.3. Bronchioles and Asthma
5.7. The Lungs and the Pleural Interface
5.7.1. Gross Anatomy
5.7.2. Pleural Dynamics
5.8. Microscopic Anatomy: The Alveolar Site of Exchange
5.8.1. Alveolar Cells
5.8.2. The Role of Surfactant
5.9. Mechanics of Breathing: The Physics of Ventilation
5.9.1. Inhalation
5.9.2. Exhalation
5.10. Spirometry and Lung Volumes
5.11. Gas Exchange Physiology: Fick’s Law
5.12. Oxygen and Carbon Dioxide Transport
5.12.1. Oxygen Transport
5.12.2. CO2 Transport
5.13. Neural and Humoral Control of Respiration
5.13.1. Control Centers
5.13.2. Chemical Feedback
5.14. Clinical Assessment Findings
5.15. Self-Assessment: Multiple-Choice Questions
5.16. Answer Key
References

Chapter 6 Gastrointestinal System
6.1. Introduction to the Gastrointestinal System: Core Functions and Integrated Physiology
6.1.1. Core Functions of the Digestive System
6.1.2. Transportation and Motility
6.1.3. Real-World Connection: Paralytic Ileus versus Mechanical Obstruction
6.2. Foundational Histology of the Alimentary Canal
6.2.1. The Mucosa: The Primary Functional Interface
6.2.2. The Submucosa and the Submucosal Plexus
6.2.3. The Muscularis Externa: Motility and the Myenteric Plexus
6.2.4. Serosa and Adventitia: The Outer Boundary
6.3. Upper GI: Oral Cavity and Teeth
6.3.1. Anatomy of the Tooth
6.3.2. Supporting Structures and Periodontium
6.3.3. Development and Dentition
6.3.4. Clinical Case: Periodontal Disease
6.4. The Esophagus: Propulsion and Protective Adaptations
6.4.1. The Mechanism of Deglutition (Swallowing)
6.4.2. Clinical Case: Barrett’s Esophagus and GERD
6.5. The Stomach: Mechanical Churning and Gastric Secretion
6.5.1. Anatomical Regions and Muscular Specialization
6.5.2. Gastric Glands and Cell Physiology
6.5.3. Phases of Gastric Regulation
6.5.4. Real-World Case: Zollinger–Ellison Syndrome
6.6. The Small Intestine: The Hub of Digestion and Nutrient Absorption
6.6.1. Anatomical Segments
6.6.2. Structural Enhancements for Absorption
6.6.3. Biochemistry of Digestion
6.6.4. Clinical Highlight: Celiac Disease
6.7. The Large Intestine: Water Homeostasis and Feces Formation
6.7.1. Anatomy and Unique Features
6.7.2. Microbiome and Water Absorption
6.7.3. Clinical Application: Diverticular Disease
6.8. Accessory Organ: The Liver and Biliary System
6.8.1. Gross Anatomy and Lobe Structure
6.8.2. The Liver Lobule and Kupffer Cells
6.8.3. Biliary Path
6.9. Vascular Supply and Hepatic Portal System
6.9.1. The Hepatic Portal System
6.9.2. Clinical Highlight: The First-Pass Effect
6.9.3. Portal Hypertension
6.10. The Enteric Nervous System: The “Second Brain”
6.10.1. Plexus Coordination
6.10.2. Pathologies of the ENS: Hirschsprung and Achalasia
6.11. Self-Assessment: Multiple-Choice Questions
6.12. Answer Key
References

Chapter 7 Nutrition and Metabolism
7.1. Introduction—Biological Metabolism
7.1.1. Bioenergetics and the Laws of Thermodynamics
7.1.2. The Metabolic Duality: Anabolism versus Catabolism
7.2. Adenosine Triphosphate: The Molecular Currency of Life
7.2.1. Molecular Structure and High-Energy Bonds
7.2.2. Cellular Applications of ATP
7.3. Carbohydrate Metabolism: The Primary Energetic Flux
7.3.1. Digestion, Absorption, and Cellular Uptake
7.3.2. Glycolysis: The Universal Metabolic Path
7.3.3. Aerobic Respiration: The Mitochondria and the Krebs Cycle
7.3.4. Oxidative Phosphorylation and the Electron Transport Chain
7.3.5. Anaerobic Metabolism: Lactic Acid Fermentation
7.3.6. Gluconeogenesis and Glycogen Dynamics
7.4. Lipid Metabolism: The Energy Reservoir
7.4.1. Digestion and the Chylomicron Pathway
7.4.2. Beta-Oxidation and the Carnitine Shuttle
7.4.3. Ketogenesis and Diabetic Ketoacidosis (DKA)
7.5. Protein Metabolism and the Urea Cycle
7.5.1. Deamination and Transamination
7.5.2. The Urea Cycle: Detoxifying Nitrogen
7.5.3. Nitrogen Balance and Critical Illness
7.6. Metabolic Regulation and the Endocrine Control System
7.6.1. The Pancreatic Hormones: Insulin and Glucagon
7.6.2. Cortisol and the Stress Response
7.6.3. Appetite Regulation and Satiety Signals
7.7. Energy Expenditure and Metabolic Rate
7.7.1. Components of Total Energy Expenditure (TEE)
7.7.2. Measuring Metabolism: Indirect Calorimetry
7.8. Micronutrients: Vitamins and Their Metabolic Roles
7.8.1. Fat-Soluble Vitamins (A, D, E, and K)
7.8.2. Water-Soluble Vitamins (B Complex and C)
7.9. Clinical Assessment of Nutrition and Metabolism
7.9.1. Body Mass Index (BMI) and Weight Distribution
7.9.2. Thermoregulation and Metabolic Stress
7.10. Conclusion: The Integrative Nature of Metabolism
7.11. Self-Assessment: Multiple-Choice Questions
7.12. Answer Key and Rationales
References

Chapter 8 Anatomy and Physiology of the Human Reproductive System
8.1. Introduction to Reproductive Biology
8.1.1. Core Terminology and Definitions
8.2. Embryonic Development and Sexual Differentiation
8.2.1. The Role of Hormonal Signaling
8.2.2. Homologous Structures
8.3. The Male Reproductive System: Primary Anatomy
8.3.1. The Testes and Scrotum
8.3.2. Internal Architecture and Histology
8.4. Spermatogenesis and the Blood–Testis Barrier
8.4.1. The Blood–Testis Barrier
8.4.2. Phases of Spermatogenesis
8.5. Sperm Transport and the Duct System
8.5.1. The Epididymis and Ductus Deferens
8.6. Accessory Glands and Semen Composition
8.7. Anatomy of the Penis and Erection
8.7.1. Mechanism of Erection
8.8. Anatomy of the Female Reproductive System: Vulva and Vagina
8.8.1. The Vulva and Bartholin’s Glands
8.8.2. The Vagina and Microbiome
8.9. The Ovaries and Uterine Tubes
8.9.1. The Ovaries
8.9.2. The Uterine (Fallopian) Tubes
8.10. The Uterus and Uterine Wall
8.10.1. Layers of the Uterine Wall
8.11. Physiology of Oogenesis
8.12. Folliculogenesis and the Ovarian Cycle
8.13. The Uterine (Menstrual) Cycle
8.14. Physiology of Labor and Parturition
8.15. Anatomy and Physiology of Lactation
8.16. Pathologies: Benign Prostatic Hyperplasia and Prostate Health
8.17. Pathologies: Polycystic Ovary Syndrome and Pelvic Inflammatory Disease
8.18. Self-Assessment: Multiple-Choice Questions
8.19. Answer Key
References

Chapter 9 Urinary System
9.1. The Vital Role of the Urinary System in Human Homeostasis
9.1.1. Gross Anatomy and Positioning of the Kidneys
9.1.2. Clinical Correlation: The Dangers of Rapid Weight Loss
9.2. Internal Anatomy and the Path of Urine Flow
9.2.1. The Renal Cortex and Medulla: The Filtering Zones
9.2.2. The Renal Hilum and Vasculature
9.3. The Nephron: The Microscopic Engine of the Kidney
9.3.1. Structural Classification of Nephrons
9.3.2. The Renal Corpuscle: The Filtration Interface
9.3.3. The Juxtaglomerular Apparatus (JGA): The Sensor Hub
9.4. Physiology of Urine Formation: Stage 1—Glomerular Filtration
9.4.1. The Mechanism of Filtration
9.4.2. Starling Forces and Net Filtration Pressure (NFP)
9.4.3. The Glomerular Filtration Rate
9.5. Physiology of Urine Formation: Stage 2—Tubular Reabsorption
9.5.1. Reabsorption in the PCT
9.5.2. The Concept of Renal Threshold and Diabetes Mellitus
9.6. Physiology of Urine Formation: Stage 3—Tubular Secretion
9.7. Concentration of Urine: The Countercurrent Multiplier System
9.7.1. The Vertical Medullary Osmotic Gradient
9.7.2. The Collecting Duct and the Role of Aquaporins
9.8. Hormonal Regulation and Pharmacology of the Kidney
9.8.1. The Renin–Angiotensin–Aldosterone System
9.8.2. Clinical Pharmacology: ACE Inhibitors and Diuretics
9.9. Clinical Assessment: Lab Markers and Disease States
9.9.1. GFR, Creatinine, and Blood Urea Nitrogen (BUN)
9.9.2. Urinary Tract Infections (UTIs) and Obstructions
9.10. Micturition and the Lower Urinary Tract
9.10.1. Ureters and the Urinary Bladder
9.10.2. The Urethra and the Micturition Reflex
9.11. Self-Assessment: Multiple-Choice Questions
9.12. Answer Key
References