Imagine something small enough to float on a particle of dust that holds the keys to understanding cancer, virology, and genetics. Luckily for us, such a thing exists in the form of trillions upon trillions of human, lab-grown cells...

If you lined up all the blood vessels in your body, they'd be 60 thousand miles long. And every day, they carry the equivalent of over two thousand gallons of blood to the body's tissues. What effect does this pressure have on the walls...

Your body produces more than a liter of mucus every day, and when you're sick, it can be hard to miss. But what exactly is mucus? And what does it do, besides making you miserable? Katharina Ribbeck reveals the mysteries of this...

Halitosis is a curse that has plagued humanity since ancient times. But what causes it, and why is it so universally terrifying? Mel Rosenberg outlines the basics of bad breath and what you can do when it strikes you.

Has anyone ever told you, "Stand up straight!" or scolded you for slouching at a family dinner? Comments like that might be annoying"but they're not wrong. Your posture is the foundation for every movement your body makes and can...

The word bipolar means 'two extremes.' For the many millions experiencing bipolar disorder around the world, life is split between two different realities: elation and depression. So what causes this disorder? And can it be treated?...

Each year in the United States, players of sports and recreational activities receive between 2.5 and 4 million concussions. How dangerous are all those concussions? The answer is complicated and lies in how the brain responds when...

Before the sun never set on the British Empire; before Genghis Khan swept the steppe; before Rome extended its influence to encircle the Mediterranean Sea; there was ancient Assyria. Considered by historians to be the first true empire,...

What keeps you up at night? Pondering deep questions? Excitement about a big trip? Stress about unfinished work? What if the very thing keeping you awake was stress about losing sleep? This seemingly unsolvable loop is at the heart of...

Most of us don't need more than one whiff to identify that generally unpleasant, characteristic smell we call body odor. But it's a surprisingly complex phenomenon, influenced by our genetic makeup, age, diet, and hygiene. So what is...

Water is essentially everywhere in our world, and the average human is composed of between 55 and 60% water. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? Mia Nacamulli details the...

Imagine trying to use words to describe every scene in a film, every note in a song, or every street in your town. Now imagine trying to do it using only the numbers 1 and 0. Every time you use the Internet to watch a movie, listen to...

Howcast - Learn how diet, obesity, and diabetes can cause erectile dysfunction in this Howcast video.

Howcast - Learn how snoring can cause erectile dysfunction in this Howcast video.

Howcast -Learn about the theories as to what causes autism from pediatrician and child development expert Asma J. Sadiq, M.D. in this Howcast video.

You see them everywhere: CBD gummies, CBD lotions, CBD drinks, CBD toothpicks. But what exactly are you buying? Buyer beware! We dive deep into why the FDA is cracking down on CBD companies over “unsupported” medical claims and how you...

Beriberi (Thiamine Deficiency): Wet vs Dry Beriberi, Pathophysiology, Symptoms, Diagnosis, Treatment



Beriberi is a set of two conditions (Wet beriberi and Dry beriberi) that are caused by a deficiency of vitamin B1 (thiamine)....

Swimmer’s Ear (Otitis Externa) | Risk Factors, Causes, Signs & Symptoms, Diagnosis, Treatment



Swimmer’s ear (also known as otitis externa) is a relatively common infection of the external auditory canal (external ear). Many...

Medical Terminology, Lesson 3: Prefixes and Suffixes of Medical Conditions and Processes, Introduction to Blood and Electrolyte Markers and Indicators



Hey guys! In this video, you will learn basics of medical terminology...

Obstructive Sleep Apnea (OSA) | Causes, Risk Factors, Signs & Symptoms, Complications, Diagnosis, Treatment



Obstructive Sleep Apnea (OSA) is a very common condition involving decreased airflow due to obstruction and in the...

Chronic Diarrhea | Approach to Causes, Secretory vs Osmotic vs Inflammatory, Watery vs Bloody Diarrhea



Chronic diarrhea is diarrhea occurring for greater than 2-4 weeks, and it is broadly categorized into secretory, osmotic,...

Soaring addiction and overdose death rates have spurred calls for a comprehensive prevention and treatment response. Yet too few people are getting care that works. What would a better system look like, and what are insurers willing to...

Non-Alcoholic Fatty Liver Disease & Diet | Diets to Prevent and Reduce Severity of NAFLD



Non-Alcoholic Fatty Liver Disease (NAFLD) is the most common type of chronic liver disease worldwide, with much of its etiology due to...

Chronic Cough | 3 Most Common Causes & Approach to Causes



This lesson is on an approach to determining the cause of a chronic cough. In this lesson, we discuss how a chronic cough is defined, an approach to determine the...