Inside the living body

How does your brain respond to pain? - Karen D. Davis Some people take aspirin or ibuprofen to treat everyday aches and pains, but how exactly do the different classes of pain relievers work? Learn about the basic physiology of how humans experience pain, and the mechanics of the medicines we've invented to block or circumvent that discomfort. Interested in the theories of pain, dating from the 17th century until modern times? See this article. Interested in how individual variability in brain circuits are related to mind-wandering from pain? See the original article and discussions in the scientific community Pain Research Forum and in the Health News from NPR.

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How your muscular system works - Emma Bryce Every time we blink, take a walk, or lift something heavy, we have the muscular system to thank for enabling us to move. It’s such a big part of daily life, and so physically vast, that it helps to have an overview of how this system works. This page from the National Institutes of Health provides a useful guide to the muscular system and the muscles’ various roles. And this helpful interactive chart gives you a front and back view of human muscles, grouped by type. Let’s zoom in and take a closer look at the different muscle types.

The world observed through eyes that see: The greatest story never told In this blog entry (which will be my last) I will provide a small glimpse of the greatest story available to mankind. Experienced daily, but unknown to the masses, the same drama unfolds on all major layers of holographic nature: atomically, physically, mentally, spiritually and on planetary/ universal level and on all time frames (second, minutes, hours, days, weeks, months, years, lifetimes and ages). The information is too large to grasp and too complex to put into words, thus revelation of a simple, well known myth may help to understand.

How the heart actually pumps blood - Edmond Hui The technique of demonstrating the pumping mechanism of the heart was first shown in public in this TEDx Talk.The detailed scientific description of the technique was published in the European journal, Science in School. There is a beautiful app from Touch Press by Martin Clayton on Leonardo Da Vinci’s anatomical studies, explaining the difficulties he had trying to understand the heart.This book by Thomas Wright describes the discovery of circulation by William Harvey, a hundred years after Leonardo Da Vinci. Harvey was also the first to prove that the heart is a pump, but he did it by lethal and gory demonstrations on live dogs. Many animals would have been saved if he had discovered this technique!

Metaphysical The Living Body With meticulous and startling detail, The Living Body examines the miracle of the human species from birth to death. The journey of a human life - the inner processes that bind us all - has rarely been rendered with such stunning clarity and insight. An Emmy-winning feature length documentary produced by Naked Science, The Living Body utilizes 3D computerized graphics, cutting-edge special effects and exploratory footage from actual human subjects to dramatize the manner by which our complex design accommodates each milestone phase of human development. The revelations begin at the moment of birth. Filled with amniotic fluid, a baby's lungs have never before breathed air while in the womb. What does the pancreas do? - Emma Bryce So what does this internal health coach look like? To find out, take a look at the organ and see where it lives in the body. Its prime position close to the stomach allows it to help us digest our food, with the aid of the enzymes—amylase, protease, and lipase—present in the special pancreatic juice it makes. Why is digestion important anyway, and how does the pancreas fit into this process? Read more here to find out. But digestion isn't the pancreas' only role.

How your digestive system works - Emma Bryce The digestive system is a marvel of evolution. The NIH provides a helpful overview on its different parts and how they all work together. If you want more detail on the individual organs, see these sources about the gastrointestinal tract, the long organ that incorporates the esophagus, the stomach, the small intestine and large intestine, anus and rectum. Then there’s also the pancreas, liver, and gallbladder, each playing their vital parts in breaking food down.

How do your kidneys work? - Emma Bryce Kidneys play a vital role in your body. Why are kidneys so important? Visit the National Kidney Foundation and find out more details about hypertension, diabetes and other ways they can become damaged. Click this link and find out how to keep those kidneys healthy. Why do blood types matter? - Natalie S. Hodge As with most topics in human genetics, blood type is more complicated than it appears on the surface. There are other human blood groups that are less common than the ABO blood group. For example, the Bombay Phenotype is a recessive condition in which the precursor of the A or B antigen, the H antigen, is not made. It occurs in about 1 in 10,000 people in India and 1 in million people in Europe. Even though someone inherits the alleles for an A or a B antigen, they can’t make these antigens if they don’t have the instructions on HOW to make them. For more info on the Bombay phenotype, visit this site.

How do drugs affect the brain? - Sara Garofalo A drug can be defined as any substance able to produce a change to our body. Drugs able to produce a known effect on the nervous system are referred to as psychoactive drugs, for their ability to influence cognitive and behavioral abilities regulated by the brain’s interconnected network of neurons and to overcome the blood–brain barrier (BBB). The BBB has been only quickly covered in this lesson, but it is a very interesting topic that you can learn more about here and here.