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Blood Groups, Blood Typing and Blood Transfusions The discovery of blood groups Experiments with blood transfusions, the transfer of blood or blood components into a person's blood stream, have been carried out for hundreds of years. Many patients have died and it was not until 1901, when the Austrian Karl Landsteiner discovered human blood groups, that blood transfusions became safer. Mixing blood from two individuals can lead to blood clumping or agglutination. Karl Landsteiner's work made it possible to determine blood groups and thus paved the way for blood transfusions to be carried out safely. What is blood made up of? An adult human has about 4–6 liters of blood circulating in the body. Blood consists of several types of cells floating around in a fluid called plasma. The red blood cells contain hemoglobin, a protein that binds oxygen. The white blood cells fight infection. The platelets help the blood to clot, if you get a wound for example. The plasma contains salts and various kinds of proteins. What are the different blood groups?
Edheads - Activate Your Mind! MEDtropolis ® - Home Page Genes to Cognition Online home 49 Fascinating YouTube Videos to Learn About the Human Body | Health Perfect As any doctor, nurse practitioner or other health care professional knows, the body is an interesting system. In many ways, it’s like a machine, with many complex parts. There is a lot to learn about the body and how it works, as well as how its different systems interact to create a larger system. Here are 49 interesting YouTube videos that can help you learn about the human body: Brain Your brain directs the rest of the body’s functions. How the Body Works: The Regions of the Brain: An interesting look at the different regions of the brain, and what they are responsible for.Brain Anatomy Function: How brain works? Nervous System The nervous system brings messages from the brain to all over the body. How the Body Works: The Anatomy of the Central Nervous System: Find out how the nervous system is set up, and how it works.How the Body Works: Anatomy of Nerve: The nervous system is made up of thousands of nerves. Muscles Skeleton Circulatory and Respiratory Systems Other Systems
How Cells Work | HowStuffWorks At a microscopic level, we are all composed of cells. Look at yourself in a mirror -- what you see is about 10 trillion cells divided into about 200 different types. Our muscles are made of muscle cells, our livers of liver cells, and there are even very specialized types of cells that make the enamel for our teeth or the clear lenses in our eyes! If you want to understand how your body works, you need to understand cells. Everything from reproduction to infections to repairing a broken bone happens down at the cellular level. If you want to understand new frontiers like biotechnology and genetic engineering, you need to understand cells as well. Anyone who reads the paper or any of the scientific magazines (Scientific American, Discover, Popular Science) is aware that genes are BIG news these days. BiotechnologyGene splicingHuman genomeGenetic engineeringRecombinant DNAGenetic diseasesGene therapyDNA mutationsDNA fingerprinting or DNA profiling
Magic Pen - Physics - Draw shapes and allow the rules of physics to do the rest." /> Magic Pen votes: collecting..times played: 5328232author: Alejandro Guillen VIEW ALL SCORES (new window) <object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase=' width='400' height='250' align='middle' /><param name='movie' value= ', 'stage', '400', '250', '6', '#43587f'); fo.addParam('MENU', 'FALSE'); fo.write('shoutbox-swf'); // ]]> Magic Pen Instructions Make clever use of physic to collect all flags in each level. Video Walkthroughs here:Levels 1-11Levels 12-26 The shapes that you draw are affected by gravity, friction and inertia. The red ball (or red square in some levels), is the object that collects the flags. You can use pins and hinges to link two objects together. To erase a single object hold down A as you left click a shape. About Magic Pen Related Games Multiplayer Games
CELLS alive! INSIGHT HEART Augmented Reality App