Online courses directory (125)

Learn about how arteries differ from veins and how arteries can get damaged over time. Arteries vs. Veins - What's the difference?. Arteriosclerosis, Arteriolosclerosis, and Atherosclerosis. Atherosclerosis - Part 1. Atherosclerosis - Part 2. Arteriolosclerosis - Part 1. Arteriolosclerosis - Part 2. Arteries vs. Veins - What's the difference?. Arteriosclerosis, Arteriolosclerosis, and Atherosclerosis. Atherosclerosis - Part 1. Atherosclerosis - Part 2. Arteriolosclerosis - Part 1. Arteriolosclerosis - Part 2.

Learn about the cervical (neck) spine through an Xray!. Adequacy of the Lateral Cervical Spine X-Ray. Assessing Alignment of the Lateral Cervical Spine (neck) X-Ray. Cervical Spine Protection in Airway Management (not a substitute for formal training). Adequacy of the Lateral Cervical Spine X-Ray. Assessing Alignment of the Lateral Cervical Spine (neck) X-Ray. Cervical Spine Protection in Airway Management (not a substitute for formal training).

Find out how preload, afterload, and contractility work together to change your PV Loop (and affect stroke volume and cardiac output)!. What is Preload?. What is afterload?. Increasing the Heart's Force of Contraction. Reimagine the Pressure Volume Relationship. What is Contractility?. Getting Ea (Arterial Elastance) from the PV Loop. Arterial Elastance (Ea) and Afterload. Arterial Elastance (Ea) and Preload. Stroke Work in PV Loops and Boxes. Contractility, Ea, and Preload Effects on PV Boxes. What is Preload?. What is afterload?. Increasing the Heart's Force of Contraction. Reimagine the Pressure Volume Relationship. What is Contractility?. Getting Ea (Arterial Elastance) from the PV Loop. Arterial Elastance (Ea) and Afterload. Arterial Elastance (Ea) and Preload. Stroke Work in PV Loops and Boxes. Contractility, Ea, and Preload Effects on PV Boxes.

Get a ring-side seat as a pathologist talks about colon cells under the microscope. Normal Colon Tissue. Hyperplasia in Colon Tissue. Colon Dysplasia. Cancerous Colon Tissue. Normal Colon Tissue. Hyperplasia in Colon Tissue. Colon Dysplasia. Cancerous Colon Tissue.

Learn about hormones and diabetes, as well as some important information on glucose control. Intro to the Endocrine System. Precocious Puberty. Childhood Growth. Glucose Insulin and Diabetes. Blood Sugar Levels. Glucose Concentration Conversion. A1C Levels. Intro to the Endocrine System. Precocious Puberty. Childhood Growth. Glucose Insulin and Diabetes. Blood Sugar Levels. Glucose Concentration Conversion. A1C Levels.

Find out how the heart and circulatory system work in the fetus!. Meet the Placenta!. Umbilical vessels and the Ductus Venosus. Flow through the Heart. Hypoxic Pulmonary Vasoconstriction. Foramen Ovale and Ductus Arteriosus. Fetal Hemoglobin and Hematocrit. Double Bohr Effect. Fetal Circulation Right Before Birth. Baby Circulation Right After Birth. Fetal Structures in an Adult. Meet the Placenta!. Umbilical vessels and the Ductus Venosus. Flow through the Heart. Hypoxic Pulmonary Vasoconstriction. Foramen Ovale and Ductus Arteriosus. Fetal Hemoglobin and Hematocrit. Double Bohr Effect. Fetal Circulation Right Before Birth. Baby Circulation Right After Birth. Fetal Structures in an Adult.

Learn some basics about the Health Care system in the US. Blue Cross and Blue Shield. Conversation About Drug Pricing. Health Care Costs in US vs Europe. Healthcare System Overview. Paying Doctors. Medicare Overview. Blue Cross and Blue Shield. Conversation About Drug Pricing. Health Care Costs in US vs Europe. Healthcare System Overview. Paying Doctors. Medicare Overview.

Learn some of the fundamentals behind staying healthy: Reducing your salt, keeping your weight in a healthy range, and exercising regularly. Low salt diet. Spotting salty foods. Calculate your own Body Mass Index. Introduction to exercise. 11 major muscle groups. Low salt diet. Spotting salty foods. Calculate your own Body Mass Index. Introduction to exercise. 11 major muscle groups.

Check out the flow of positive charge through the heart that happens every time your heart beats! Learn how the heart is able to keep a regular rate and rhythm throughout your life. Membrane Potentials - Part 1. Membrane Potentials - Part 2. Permeability and Membrane Potentials. Action Potentials in Pacemaker Cells. Action Potentials in Cardiac Myocytes. Reseting Cardiac Concentration Gradients. Electrical System of the Heart. Depolarization Waves Flowing through the Heart. A Race to Keep Pace!. Thinking about Heartbeats. New Perspective on the Heart.

Check out the flow of positive charge through the heart that happens every time your heart beats! Learn how the heart is able to keep a regular rate and rhythm throughout your life. Membrane Potentials - Part 1. Membrane Potentials - Part 2. Permeability and Membrane Potentials. Action Potentials in Pacemaker Cells. Action Potentials in Cardiac Myocytes. Reseting Cardiac Concentration Gradients. Electrical System of the Heart. Depolarization Waves Flowing through the Heart. A Race to Keep Pace!. Thinking about Heartbeats. New Perspective on the Heart. Membrane Potentials - Part 1. Membrane Potentials - Part 2. Permeability and Membrane Potentials. Action Potentials in Pacemaker Cells. Action Potentials in Cardiac Myocytes. Reseting Cardiac Concentration Gradients. Electrical System of the Heart. Depolarization Waves Flowing through the Heart. A Race to Keep Pace!. Thinking about Heartbeats. New Perspective on the Heart.

Find out what can cause a heart disease and stroke, and how the two are related!. Heart Disease and Heart Attacks. Thrombo-emboli and Thromboembolisms. Stenosis, ischemia and heart failure. Strokes. Heart Disease and Heart Attacks. Thrombo-emboli and Thromboembolisms. Stenosis, ischemia and heart failure. Strokes.

Find out more about heart muscles and what happens when they contract. Three Types of Muscle. Heart Cells Up Close!. Myosin and Actin. Tropomyosin and troponin and their role in regulating muscle contraction. Calcium Puts Myosin to Work. Sympathetic Nerves Affect Myosin Activity. Why Doesn't the Heart Rip?. Three Types of Muscle. Heart Cells Up Close!. Myosin and Actin. Tropomyosin and troponin and their role in regulating muscle contraction. Calcium Puts Myosin to Work. Sympathetic Nerves Affect Myosin Activity. Why Doesn't the Heart Rip?.

Learn all about hypertension: symptoms, diagnosis, and how lifestyle changes can make a difference!. What is hypertension?. Hypertension symptoms and categories. Hypertension effects on the blood vessels. Hypertension effects on the heart. 4 lifestyle changes to help manage hypertension. What is hypertension?. Hypertension symptoms and categories. Hypertension effects on the blood vessels. Hypertension effects on the heart. 4 lifestyle changes to help manage hypertension.

Most people have had the flu virus at least once in their lives, and it

Ever wonder about your lab values and what they mean? Lab values measure amounts of electrolytes or cells in your blood and occasionally tell you about how hormones and enzymes are working! Dive deeper and get a good understanding of concentrations as well!. Introduction to lab values and normal ranges. What's Inside of Blood?. Units for common medical lab values. What is an equivalent?. The mole and avogadro's number. Molarity vs. Molality. Molarity vs. Osmolarity. Calculate your own osmolarity. Molarity, Molality, Osmolarity, Osmolality, and Tonicity - What's the difference?. Tonicity - comparing 2 solutions. Introduction to lab values and normal ranges. What's Inside of Blood?. Units for common medical lab values. What is an equivalent?. The mole and avogadro's number. Molarity vs. Molality. Molarity vs. Osmolarity. Calculate your own osmolarity. Molarity, Molality, Osmolarity, Osmolality, and Tonicity - What's the difference?. Tonicity - comparing 2 solutions.

MCAT Video Competition. MCAT Video Competition Details. How to make a video. MCAT Video Competition. MCAT Video Competition Details. How to make a video.

Enjoy!. Bacterial Meningitis. Ritual of the Bedside Exam. Systemic Thinking About Cancer. Inflammation. Bacterial Meningitis. Ritual of the Bedside Exam. Systemic Thinking About Cancer. Inflammation.

Learn how the sympathetic and parasympathetic nerves regulate your heart in so many different ways!. Changing the AV Node Delay - Chronotropic Effect. Changing the Heart Rate - Chronotropic Effect. Increasing Ventricular Contractility - Inotropic effect. Autonomic Nervous System Effects on the Heart. Getting a New Heart. Changing the AV Node Delay - Chronotropic Effect. Changing the Heart Rate - Chronotropic Effect. Increasing Ventricular Contractility - Inotropic effect. Autonomic Nervous System Effects on the Heart. Getting a New Heart.

Find out exactly what preload and afterload mean, and why most of us use a handy shortcut to guess-timating what they are!. Why Doesn't the Heart Rip?. What is Preload?. Preload and Pressure. Preload Stretches out the Heart Cells. Frank-Starling Mechanism. Sarcomere length-tension relationship. Active contraction vs. passive recoil. What is afterload?. Increasing the Heart's Force of Contraction. Why Doesn't the Heart Rip?. What is Preload?. Preload and Pressure. Preload Stretches out the Heart Cells. Frank-Starling Mechanism. Sarcomere length-tension relationship. Active contraction vs. passive recoil. What is afterload?. Increasing the Heart's Force of Contraction.

Watch as the pressure and amount of blood inside the left ventricle go up and down within fractions of a second!. Pressure in the Left Heart - Part 1. Pressure in the Left Heart - Part 2. Pressure in the Left Heart - Part 3. Left Ventricular Pressure vs. Time. Left Ventricular Volume vs. Time. Drawing a Pressure-Volume Loop. Understanding the Pressure-Volume Loop. End Diastolic Pressure-Volume Relationship (EDPVR). End Systolic Pressure-Volume Relationship (ESPVR). Reimagine the Pressure Volume Relationship. What is Preload?. Why Doesn't the Heart Rip?. Pressure in the Left Heart - Part 1. Pressure in the Left Heart - Part 2. Pressure in the Left Heart - Part 3. Left Ventricular Pressure vs. Time. Left Ventricular Volume vs. Time. Drawing a Pressure-Volume Loop. Understanding the Pressure-Volume Loop. End Diastolic Pressure-Volume Relationship (EDPVR). End Systolic Pressure-Volume Relationship (ESPVR). Reimagine the Pressure Volume Relationship. What is Preload?. Why Doesn't the Heart Rip?.