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Pre-capillary sphincters | Circulatory system physiology | NCLEX-RN | Khan Academy

So we often talk about capillary beds, but I thought that it would be fun to get really up close and really get a good understanding of how these things work. Couple of neat freaks(?) our body has developed to make sure that blood gets to the areas where it needs to go. So let’s […]

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Arterial elastance (Ea) and afterload | Circulatory system physiology | NCLEX-RN | Khan Academy

Let’s go ahead and use our pressure volume loop. I’m going to sketch out how afterload would make things change on this. So let’s just quickly sketch this out. I’m going to put pressure over here. And I’m going to start out with just two lines. First, and this is probably the one I want […]

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Meet the kidneys! | Renal system physiology | NCLEX-RN | Khan Academy

Voiceover: Imagine you’re in a movie theater. You’re watching a really, really long movie. And you’ve finished your entire bucket of popcorn. You’ve guzzled down a giant soda and all of a sudden, you have to pee. And to make matters worse, you’re watching a movie about a whole bunch of people on a cruise […]

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Circulatory & Respiratory Systems – CrashCourse Biology #27

يحتاج أفراد المملكة الحيوانيةإلى الأكسجين لإنتاج الطاقة. الأكسجين أساسي؛ومن دونه، سنموت. لكن كما تعلمون،فالناتج الثانوي للتنفس الخلوي الذي يبقينا أحياءهو ثاني أكسيد الكربون أو CO2،الذي لا يفيد أجسامنا كثيرًا. لذا، نحن لا نحتاج إلى استنشاق الأكسجين فحسب، بل علينا التخلص من ثاني أكسيد الكربون. ولهذا السبب، لدينا الجهاز التنفسي والجهاز الدوراني لإدخال الأكسجين من الهواء […]

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USMLE Cardiovascular 1: Anatomy and Physiology of the Heart and Blood Vessels

this video kicks up our talk on the cardiovascular system the cardiovascular system and the cardiovascular system is a system in our body that pumps blood around and then is made of those two parts met above the heart which is the actual pump and then it's made up of blood vessels which is what […]

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