Hypertension symptoms and categories | Health & Medicine | Khan Academy

All right. Let’s talk about hypertension. And the first thing we have to do is understand the two main categories, or types, of hypertension that are out there. So there are two types, primary– and this is actually also called essential hypertension. You might hear that word, essential. And secondary. And I’ll write that as a two. And […]

Calculate your own body mass index | Miscellaneous | Heatlh & Medicine | Khan Academy

So let’s talk about body mass index, BMI. This is a term that’s often discussed, and so let’s first figure out how it’s calculated. How do we figure this out? So if you have a little stick person, what you could do is have them step on a scale. And you get their weight. So the first thing […]

Learn how a stethoscope can help determine blood pressure | NCLEX-RN | Khan Academy

So this is a picture of Doctor Korotkoff. Doctor Korotkoff is a very famous Russian doctor. He lived about 100 years ago, and something he came up with, something very clever, still affects all of us, or most of us today. So he lived in the early 1900s. And around 1905, he started thinking. He was thinking about […]

What is hypertension? | Circulatory system diseases | Health & Medicine | Khan Academy

Let’s talk about hypertension. And I’ll write that here, hypertension. And hypertension basically means high blood pressure. And we actually categorize it in different groups. So let’s use my blood pressure, 115 over 75 as an example. And I had drawn a small figure for you where I had blood pressure on this side and I had time […]

Why haven’t we cured arthritis? – Kaitlyn Sadtler and Heather J. Faust

While regaling you with daring stories from her youth, it might be hard to believe your grandmother used to be a trapeze artist. However, the bad backs, elbow pain, and creaky knees so common in older people is more than just “old age.” In fact, the source of this stiffness plagues many young people as well. The culprit […]

Paramedic 2.02 – Anatomy and Physiology: Planes and Sections of the Body

In this module, we will define various anatomical planes and sections of the body. Once completed with this module, you should be able to identify the planes and sections of the body and define directional and positional terms used in anatomical landmarking. When defining anatomical structures in the body, it can be helpful to utilize anatomical landmarks or […]

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Atherosclerosis – part 1 | Circulatory system diseases | Health & Medicine | Khan Academy

So I wanted to talk to you a little bit about atherosclerosis. And I have already cheated a little bit, and I’ve started drawing. I wanted to make it a slightly nicer drawing, because I wanted to make sure that the important things, we can actually see them and that it’s pretty clear. So in the top left, […]

Hypertension effects on the blood vessels | Health & Medicine | Khan Academy

Now, we’ve talked about hypertension, and you know that it means that you have high blood pressure. So the next logical thing to think about is why is that bad? Why is it a problem to have high blood pressure? And I like to think about high blood pressure from two different perspectives– one would be the perspective […]