Crash Course A&p #39: Urinary System, Part 2

Join the discussion about the anatomy of your urinary system, and how your kidneys filter metabolic waste and balance salt and water concentrations in the blood. [10:18]

Can a paper bag really help you when you are hyperventilating? It turns out that it can. In part 2 of our look at your respiratory system Hank explains how your blood cells exchange oxygen and CO2 to maintain homeostasis. We'll dive into...

In the second half of our look at the endocrine system, Hank discusses chemical homeostasis and hormone cascades. Specifically, he looks at the hypothalamus-pituitary-thyroid axis, or HPT axis, and all the ways your body can suffer when...

The first of a four part series about human reproduction beginning with the female reproductive system. [10:15]

Find out how the immune system's responses begin with physical barriers like skin and mucous membranes, and when they're not enough, there are phagocytes, the neutrophils, and macrophages. It also features the natural killer cells and...

Nearly 200 years ago, Alexis St. Martin was shot in the stomach. He was saved by local army doctor William Beaumont, but had to live out his remaining years with a gaping hole in the stomach -- allowing Beaumont to learn a lot about how...

Find out how the lymphatic system supports cardiovascular function and fights off infection. [9:19]

Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it...

So we all know that breathing is pretty important, right? Today we're going to talk about how it works, starting with the nameless evolutionary ancestor that we inherited this from, and continuing to the mechanics of both simple...

Hank begins teaching you about your endocrine system by explaining how it uses glands to produce hormones. These hormones are either amino-acid based and water soluble, or steroidal and lipid-soluble, and may target many types of cells...