Medical Textbooks

Anatomy
Anatomy Atlases - Atlas of Human Anatomy | Anatomy Atlases - Atlas of Human Anatomy in Cross Section | Anatomy Atlases - Illustrated Encyclopedia of Human Anatomic Variation | Anatomy Atlases - Anatomy of First Aid - A Case Study Approach | Anatomy Atlases - Lessons From a Bone Box | Bartleby - Gray's Anatomy | Loyola University - Structure of the Human Body | Mascagni - Images from Anatomia Universa | NLM - AnatLine | State University of New York - Human Anatomy | Temple University - Neuroanatomy Lab Resource | University of Michigan - Medical Gross Anatomy | University of Michigan - Visible Human Project | University of Newcastle Upon Tyne - Anatomy Tutorials | University of Utah - Neuroanatomy Atlas | University of Utah - Visible Human | University of Washington - Digital Anatomist | University of Washington - Musculoskeletal Atlas | Whitaker - Instant Anatomy

Anatomy - Radiology
Bridgeport Hospital - Anatomy Wiz | Campus Medica - e-Anatomy - Interactive Atlas of Whole Body Cross-Sectional Anatomy | Emory University - Radiologic Anatomy | Harvard University - Whole Brain Atlas | Lee - Musculoskeletal MRI Movie Atlas | Loyola University - Cross Section Tutorial | McGill University - Radiologic Anatomy | Society for Cardiovascular Magnetic Resonance - Cardiac MRI Anatomical Atlas | University of Erlangen - Compare | University of Kansas - RadAnatomy | University of Utah - Atlases of the Brain | University of Warsaw - Atlas of Radiological Anatomy | University of Washington - Musculoskeletal Radiologic Anatomy Modules | University of Washington - Upper Extremity Muscle Atlas and Lower Extremity Muscle Atlas | University of Wisconsin - Neuroradiology Tutor | USUHS - Radiologic Anatomy Browser | Wayne State University - Radiologic Anatomy

Anesthesia
GASNet - Global Textbook of Anesthesiology

Biochemistry and Cell Biology
College of Saint Benedict and Saint John's University - Biochemistry Online | Indiana State University - Biochemistry | MIT - Biology Hypertextbook | NLM - Biochemistry | NLM - Molecular Cell Biology | University of Utah - NetBiochem

Bioethics
Georgetown University - Kennedy Institute of Ethics | NIH - Bioethics Resources | University of Pennsylvania - Center for Bioethics | University of San Diego - Ethics Updates | University of Toronto - Joint Center for Bioethics | World Medical Association - Medical Ethics Manual | Virtual Mentor

Biological, Chemical, and Nuclear Warfare
American College of Radiology - Disaster Preparedness for Radiology Professionals - Response to Radiological Terrorism (PDF format) | Armed Forces Radiobiology Research Institute - Medical Management of Radiological Casualties (PDF format) | Armed Forces Radiobiology Research Institute - Pocket Guide to Terrorism With Ionizing Radiation (PDF format) | BiodefenseEducation.org | RAND - Individual Preparedness and Response to Chemical, Radiological, Nuclear, and Biological Terrorist Attacks | US Army - Defense Against Toxin Weapons (PDF format) | US Army - Field Management of Chemical Casualties Handbook (PDF format) | US Army - Medical Management of Biological Casualties (PDF format) | US Army - Medical Management of Chemical Casualties Handbook | US Army - NATO Handbook on the Medical Aspects of NBC Defensive Operations | US Army - Textbook of Military Medicine: Medical Aspects of Chemical and Biological Warfare | US Army - Treatment of Biological Warfare Agent Casualties (PDF format) | US Army - Treatment of Chemical Agent Casualties and Conventional Military Chemical Injuries (PDF format) | US Navy - Initial Management of Irradiated or Radioactively Contaminated Personnel (PDF format)

Biostatistics
BMJ - Statistics at Square One | Children's Mercy - STATS | Statsoft - Elementary Concepts in Statistics | Tufts University - The Little Handbook of Statistical Practice

Complementary and Alternative
NIH - National Center for Complementary and Alternative Medicine

Dentistry
Merck - Merck Manual

Dermatology
Dermis - Dermatology Online Atlas | eMedicine - Dermatology | Hong Kong Medical Association - Handbook of Dermatology | Internet Dermatology Society - Electronic Textbook of Dermatology | Johns Hopkins - Dermatology Image Atlas | Loyola University - Atlas of Dermatology | Merck - Merck Manual | Oxbridge Solutions - GP Notebook | University of Utah - Dermatology Image Bank

Embryology
Harvard University - Compendium of Fetal MRI | Loyola University - Development of the Human Heart | Loyola University - Genitourinary Development | Temple University - Embryology of the Central Nervous System | University of California - Visible Embryo | Universities of Freiburg, Lausanne and Bern - Embryology.ch | University of Michigan - Multi-Dimensional Human Embryo | University of New South Wales - Embryology | University of North Carolina Chapel Hill - Embryo Images

Emergency Medicine
Anatomy Atlases - Anatomy of First Aid: A Case Study Approach | eMedicine - Emergency Medicine | Merck - Merck Manual - Poisoning | NIH - Household Products Database | NLM - Toxicology and Environmental Health | Oxbridge Solutions - GP Notebook | US Army - First Aid (PDF format) | US Navy - Standard First Aid Course

Epidemiology
BMJ - Epidemiology for the Uninitiated

Evidence Based Medicine (EBM)
BMJ - How to Read a Paper | Cochrane Collaboration - Cochrane Reviews | EBOC - Evidence Based On Call | Oxford University - Bandolier | Pediatric Critical Care Medicine - What is Evidence Based Medicine? | University of North Carolina - Introduction to Evidence-Based Medicine | University of York - DARE

Family Medicine
AHRQ - National Guideline Clearinghouse | eMedicine - Medicine | Louisiana State University - Outpatient Management Manual | Merck - Merck Manual | NHS - Prodigy Clinical Knowledge Summaries | Oxbridge Solutions - GP Notebook | University of California San Francisco - Primary Care Clinical Practice Guidelines Index | US Air Force - Independent Duty Medical Technician Medical and Dental Treatment Protocols (PDF format) | US Coast Guard - Ship's Medicine Chest | US Navy - Sickcall Screener's Handbook

Genetics
Merck - Merck Manual - Genetics | NIH - Genome.gov | NLM - Genetics Home Reference | NLM - Human Molecular Genetics | NLM - Online Mendelian Inheritance in Man

Geriatrics
Merck - Merck Manual of Geriatrics

Global Health
DHHS - GlobalHealth.gov | Harvard University - Center for Health and the Global Environment | Medact - Global Health Education | University College London - International Health and Medical Education Centre

Histology
Anatomy Atlases - Atlas of Microscopic Anatomy | Loyola University - Histology | Temple University - Histology Laboratory Assistant | University of Illinois - Atlas of Histology | University of Kansas - JayDoc HistoWeb | University of Western Australia - Blue Histology | University of Wisconsin - Histology Atlas

History of Medicine
NLM - History of Medicine | Pengelley - A Traveler's Guide to the History of Biology and Medicine | Wellcome Trust History of Medicine ( Birth, Death, Drugs, Hospitals, Medicine and Technology, Plagues and Pestilence and Public Health, Surgery, Timeline)

Humanitarian Emergencies
CDC - Famine-Affected, Refugee, and Displaced Populations: Recommendations for Public Health Issues | Medecins Sans Frontieres - Clinical Guidelines Diagnostic and Treatment Manual | Medecins Sans Frontieres - Essential Drugs | USUHS - Military Medicine Humanitarian Assistance Course

Informatics
Columbia University - Introduction to Medical Informatics | Erasmus Medical College - Handbook of Medical Informatics

Internal Medicine (including the adult subspecialties of Allergy-Immunology, Cardiology, Endocrinology, Gastroenterology, Hematology-Oncology, Infectious Disease, Nephrology, Pulmunology, Rheumatology)
AHRQ - National Guideline Clearinghouse | American Society of Hematology - Image Bank | ASM Systems - CardiologySite | CDC - Guidelines for Treating Sexually Transmitted Diseases | Cancer Management | eMedicine - Internal Medicine | Gastro Resource Center - First Principles of Gastroenterology | Jenkins - ECG Library | Johns Hopkins - Medical Management of HIV Infection | Louisiana State University - Outpatient Management Manual | Mad Scientist Software - MicroEKG Manual | McGill University - ECG Encyclopedia | MDtext - Endotext | Medecins Sans Frontieres - Clinical Guidelines Diagnostic and Treatment Manual | Medical Algorithms Project - Medical Algorithms | Merck - Merck Manual | NCI - Clinical Cancer Information | NHS - Prodigy Clinical Knowledge Summaries | NLM - Cancer Medicine | NLM - Endocrinology - An Integrated Approach | Oxbridge Solutions - GP Notebook | University of California San Francisco - AIDS Knowledge Base | University of Pennsylvania - Critical Care Medicine Tutorials | University of Pennsylvania - Primary Care Clinical Practice Guidelines Index | University of Utah - ECG Learning Center | US Air Force - Independent Duty Medical Technician Medical and Dental Treatment Protocols (PDF format) | US Coast Guard - Ship's Medicine Chest | US Navy - Guide to Malaria Prevention and Control (PDF format) | US Navy - Sickcall Screener's Handbook

Microbiology and Virology
Tulane University - Big Picture Book of Virology | University of Texas - Medical Microbiology | University of South Carolina - Microbiology, Virology, Immunology, Bacteriology, Parasitology, Mycology Online | University of Torino - Atlas of Medical Parasitology

Military Medicine
Virtual Naval Hospital

Neurology
Drexel University - Headache Interactive | eMedicine - Neurology | Merck - Merck Manual | Oxbridge Solution - GP Notebook

Neurosurgery
American Association of Neurological Surgeons - Neurosurgical Focus | eMedicine - Neurosurgery

Nutrition
American Dietetic Association - Food and Nutrition Information | Harvard School of Public Health - The Nutrition Source

Obstetrics and Gynecology
Brookside Press - Military Obstetrics and Gynecology | Brookside Press - OB-GYN 101 | eMedicine - Obstetrics and Gynecology | Merck - Merck Manual | Oxbridge Solutions - GP Notebook | University of Utah - Human Reproduction | US Navy - Operational Obstetrics and Gynecology | US Navy - Surgical Emergencies in Obstetrics and Gynecology

Ophthalmology
Columbia University - Digital Reference of Ophthalmology | eMedicine - Opthalmology | Merck - Merck Manual | New York Eye and Ear Infirmary - Digital Atlas of Ophthalmology | Oculisti - EyeAtlas | Oxbridge Solutions - GP Notebook | US Army - Textbook of Military Medicine: Ophthalmic Care of the Combat Casualty

Orthopaedic Surgery
DeGroot - BoneTumor.org | eMedicine - Orthopaedic Surgery | eMedicine - Sports Medicine | Merck - Merck Manual | Oxbridge Solutions - GP Notebook | University of Flinders - South Australian Orthopaedic Registrars' Notebook | Wheeless - Textbook of Orthopaedics | WorldOrtho - Electronic Orthopaedic Textbook | WorldOrtho - Oxford Handbook of Sports Medicine | WorldOrtho - Simple Guide to Orthopaedics

Otolaryngology
eMedicine - Otolaryngology | Merck - Merck Manual | Oxbridge Solutions - GP Notebook | University of Texas - Online Textbook of Otolaryngology

Pathology
American Association for Clinical Chemistry - Lab Tests Online | Bloodline - Image Atlas | Loyola University - Gram Staining | Plapp - ClinLabNavigator | University of Alabama Birmingham - Pathology Education Instructional Resource | University of Connecticut - Pathweb | University of Illinois - Urbana Atlas of Pathology | University of Iowa - Virtual Slide Box | University of Pennsylvania - Gram Stain Atlas | University of Utah - WebPath

Pediatrics (including the pediatric subspecialties of Allergy-Immunology, Cardiology, Endocrinology, Gastroenterology, Hematology-Oncology, Infectious Disease, Nephrology, Pulmunology, Rheumatology)
eMedicine - Pediatrics | eMedicine - Pediatric Dermatology | eMedicine - Pediatric Emergency Medicine | eMedicine - Pediatric Neurology | eMedicine - Pediatric Orthopaedics | eMedicine - Pediatric Otolaryngology | eMedicine - Pediatric Radiology | GeneralPediatrics.com | Merck - Merck Manual - Pediatrics | NLM - Online Mendelian Inheritance in Man | Oxbridge Solutions - GP Notebook | PediatricEducation.org | PedsCCM - picuBOOK | University of Hawaii - Case Based Pediatrics | University of Iowa - Iowa Neonatology Handbook | US Air Force - Pediatric Emergency Manual and its Preface | Virtual Pediatric Hospital

Pharmacology
Medecins Sans Frontieres - Essential Drugs | Merck - Merck Manual | NLM - MedlinePlus | RxList | WHO - Essential Medicines Library | WHO - Model Formulary

Physical Examination and the Approach to the Patient
Harvard University - Clinical Skills Database | Loyola University - Screening Physical Exam | O'Grady - System of Medicine | University of California San Diego - Practical Guide to Clinical Medicine | University of California San Francisco - Catalog of Clinical Images | University of Florida - Online Physical Exam Teaching Assistant | University of Florida - Physical Exam Study Guides | University of Toronto - Neurological Exan | Yale University - NeuroExam

Physical Medicine and Rehabilitation
eMedicine - Physical Medicine | Merck - Merck Manual

Physiology
University of Arizona - Gross Physiology of the Cardiovascular System | University of Copenhagen - Textbook in Medical Physiology and Pathophysiology | University of Vermont - Medical Physiology

Preventive Medicine
Armed Forces Pest Management Board - Personal Protective Measures Against Insects and Other Arthropods of Military Significance | CDC - CDC Recommends | US Army - Field Hygiene and Sanitation - FM 21-10 (PDF format) | US Navy - Manual of Naval Preventive Medicine| USPSTF - Put Prevention into Practice | USPSTF - Guide to Clinical Preventive Services

Psychiatry
American Psychiatric Association - DSM-IV-TR | eMedicine - Psychiatry | Long - Internet Mental Health | Merck - Merck Manual | Oxbridge Press - GP Notebook | University of Tasmania - Download of Psychiatry

Radiology
eMedicine - Radiology | GE - Encyclopaedia of Medical Imaging - Medcyclopaedia | McGill University - Basic Radiology Primer: An Introduction to Problem-Oriented Imaging Algorithms | Medical College of Wisconsin - Chorus | RadiologyEducation.com | SearchingRadiology.com | StudentBMJ - Introduction to Imaging | USUHS - Chest X-Ray Review | Yale University - Cardiothoracic Imaging

Surgery
eMedicine - Plastic Surgery | eMedicine - Surgery | Ethicon - Wound Closure Manual | Ethicon - Knot Tying Manual (PDF format) | Lion Reef - Vesalius | Mainprize - LearnSurgery.com | NLM - Surgical Treatment | Oxbridge Solutions - GP Notebook | Surgical Tutor | US Army - Emergency War Surgery Handbook

Travel Medicine
CDC - Travel Medicine | Merck - Merck Manual | WHO - International Travel and Health

Undersea Medicine
US Army - Textbook of Military Medicine: Medical Aspects of Harsh Environments - Volume 2 | US Navy - Diving Manual

Urology
eMedicine - Urology | Merck - Merck Manual

Veterinary Medicine
Merck - Veterinary Manual

Wilderness Medicine
eMedicine - Wilderness Medicine | High Altitude Medicine - High Altitude Medicine Guide | US Army - Heat Illness: A Handbook for Medical Officers | US Army - Heat Stress Control and Heat Casualty Management (PDF format) | US Army - Medical Aspects of Cold Weather Operations (PDF format) | US Army - Medical Problems in High Mountain Environments (PDF format) | US Army - Sustaining Health and Performance in The Cold: Environmental Medicine Guidance for Cold Weather Operations | US Army - Textbook of Military Medicine: Medical Aspects of Harsh Environments - Volume 1

Patient Simulations

AIDA - Diabetes Simulator | Auckland District Health Board - Trauma Scenarios | MDchoice - CyberPatient Simulator | LearnSurgery.com | Trauma.org - Moulage Cases | Virtual Autopsy - Cases

Karolinska Institute - Index of Patient Simulation Sites

MEDLINE and Medical Journals

MEDLINE
PubMed | PubMed-to-Email

Medical Journals
American Family Physician | BioMed Central | BMJ | Student BMJ | Directory of Open Access Journals | FreeMedicalJournals.com | JAMA | Lancet | MMWR | MS JAMA | NEJM | Pediatrics | PLoS Medicine | PubMedCentral

Handheld Computer Medical Resources

American College of Physicians - PDA Portal | Diagnosaurus | Doctors' Gadgets | Ectopic Brain | Epocrates | Handheld Recommendations | HealthyPalmPilot | Informatics Review | Johns Hopkins - Antibiotic Guide | Medical Palm Webring | Medical Pocket PC | Memoware | Palm Medicine | pdaMD | Pediatrics on Hand

Continuing Education and Board Exams / Review Questions

Continuing Education
Annotated List of Online CME Sites | NIH - Consensus Development Program | Virtual Lecture Hall

Board Exams / Review Questions
Pathology - WebPath

Medical Organizations

Professional Societies and Organizations
AACOM | AAIP | AAMC | AMA | AMA MedStudent | AMSA | AOA | APAMSA | APMA | APMSA | IFMSA | MedSIN | NBME | NMA | SNMA | SOMA | USMLE | List of Professional Health Organizations

National and International Organizations
Centers for Disease Control | Food and Drug Administration | National Institutes of Health | National Library of Medicine | World Health Organization

Patient Education / Consumer Health Information

How to Evaluate Medical Information on the Internet
Medical Library Association - Deciphering Medspeak | MedlinePlus - Guide to Healthy Web Surfing | National Cancer Institute - How to Evaluate Health Information on the Internet

Anatomy Information
Intellimed - Human Anatomy Online | NLM - MedlinePlus

Patient Education / Consumer Health Information
American Academy of Family Physicians - Patient Information | American Academy of Pediatrics - Patient Information | American Association for Clinical Chemistry - Lab Tests Online | American Baby - HealthyKids.com | American Cancer Society - Cancer Resource Center | American Dental Association - Patient Information | American Heart Association - Heart and Stroke Encyclopedia | CDC - Disease Fact Sheets | Cochrane Collaboration - Consumer Network | DHHS - HealthFinder | eMedicine - Consumer Health | Harvard University - Young Women's Resource Center | Mayo Clinic | Medem - Medical Library | Merck - Merck Manual of Health and Aging | Merck - Merck Manual of Medical Information - Home Edition | NCI - Clinical Cancer Information | Nemours - KidsHealth.org | NIH - ClinicalTrials.gov | NIH - Genome.gov | NIH - Health Information Index | NIH - Office of Rare Diseases | NLM - Genetics Home Reference | NLM - MedlinePlus | Physician's Desk Reference - Getting Well Network | Physician's Desk Reference - Guide to Medical Care | US Government - Consumer Health Information | Virtual Pediatric Hospital - Pediatric Common Questions Quick Answers | Your Surgery

NLM - Index of Consumer Health Organizations

Internet Directories and Search Engines

Health Sciences and Pediatric Directories
GeneralPediatrics.com | HealthWeb | Intute | MedWeb | Open Directory - Health: Medicine | University of Iowa - Hardin Meta Directory of Internet Health Sources | Yahoo - Health: Medicine

Health Sciences Dictionaries
MediLexicon - Pharmaceutical and Medical Abbreviations | Merriam Webster - Medical Dictionary | Stedman's - Medical Dictionary | Taber's - Cyclopedic Medical Dictionary | University of Newcastle upon Tyne - Online Medical Dictionary

Health Sciences Search Engines
MedHunt