You know what starvation is, but do you know what it does to you? Hank walks you through the three major metabolic phases of starvation, from burning sugars to, basically, self-cannibalism.

Nothing is guaranteed in life except death, taxes, and entropy. What do other life forms have to teach us about staying alive as we get old, and will we ever conquer death?

Human bodies aren't built for extreme aging: our capacity is set at about 90 years. But what does aging really mean, and how does it counteract the body's efforts to stay alive? Monica Menesini details the nine physiological traits that...

From something as miniscule as a cell to the biosphere we all call home, living things fit together in numerous interesting ways. Bobbi Seleski catalogs biology from our body and beyond, tracking how unicellular organisms, tissues,...

Paul Andersen explains the importance and location of interstitial fluid. He describes both the hydrostatic and osmotic pressures that move fluid between the interstitial fluid and the capillary. He also explains the major function of...

Scientists have found Coral reefs in new, dazzling colors, but this is a warning that the reefs are stressed out.

In this episode of Crash Course Anatomy & Physiology, Hank gives you a brief history of histology and introduces you to the different types and functions of your body's tissues.
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Today Hank wraps up our look at Connective Tissues with a discussion of its various types and a breakdown of what you can and can't easily break down. Also chicken.
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Now that we've talked about your blood vessels, we're going to zoom in a little closer and talk about your blood itself. We'll start by outlining the basic components of blood -- including erythrocytes, leukocytes, platelets, and plasma...

Originally discovered by accident, X-rays are now used about 100 million times a year in clinics around the world. How do these magic eyes work? Ge Wang details the history and mechanics of the X-ray machine and CT scanners.

Today Hank explains the skeletal system and why astronauts Scott Kelly and Mikhail Kornienko are out in space studying it. He talks about the anatomy of the skeletal system, including the flat, short, and irregular bones, and...

Paul Andersen briefly surveys members of the Domain Animalia. He begins with brief description of the phylogeny of animals. He then describes the characteristics of all animals, heterotrophy, multicellularity, motility and blastula. ...

While searching for a kidney donor, Karen Keegan stumbled upon a mystery. After undergoing genetic testing, it turned out that some of her cells had a completely different set of genes from the others. And this second set of genes...

Paul Andersen introduces Anatomy and Physiology in this podcast. He starts by describing how the form of an object fits the function. He then explains the themes of homeostasis and hierarchy. He describes the four major types of tissues;...

Hank introduces us to one of the most diverse and important families in the tree of life - the vascular plants. These plants have found tremendous success and the their secret is also their defining trait: conductive tissues that can...

What happens to your atoms when you die? About 100 billion people have died since the dawn of humanity. Since the law of conservation of matter says that matter cannot be created or destroyed, all their atoms...

Howcast - Learn about the pros and cons of penile injection therapy to treat erectile dysfunction in this Howcast video.

Howcast - Learn about Vasomax, a medication used to treat erectile dysfunction, in this Howcast video.

Howcast - Learn about Peyronie's Disease -- scar tissue inside the penis that causes curved, painful erections -- in this Howcast video.

Howcast - Learn how to determine a rabbit's age in this Howcast video featuring bunny lover Amy Sedaris and rabbit expert Mary E. Cotter.

Howcast - If that box of tissues stands out like a sore thumb, this guide will help camouflage it with just a little scrap fabric and some sewing.

Howcast - It's sad we know, but try not to cry—that onion wants to be cut up and eaten. You're just helping it fulfill its destiny.

Is that runny nose bringing you down? With over-the-counter cold remedies and a few simple steps, you can put a stop to your problem.

Don't wait until your temperature is 102 to realize that you're out of ibuprofen or it's expired. Stash away these essentials now, in an emergency flu kit.