Blood Basics
Blood is the fluid that keeps every cell in your body alive. It carries oxygen, fights infection, clots wounds, and regulates temperature — all while cycling through roughly 60,000 miles of blood vessels. These guides cover what blood is made of, how the blood supply works, and the science behind one of the most complex substances in nature.
Blood Components: Red Cells, White Cells, Platelets, and Plasma Explained
A complete guide to the four main blood components — what they are, what they do, and why each is essential to survival. Includes counts, lifespans, and clinical roles.
- ✓ Red blood cells make up 40% of blood volume and live about 120 days, carrying oxygen via hemoglobin
- ✓ White blood cells are the largest blood cells and your primary immune defense — counts rise dramatically during infection
- ✓ Plasma is 55% of blood volume and 95% water, carrying hormones, proteins, nutrients, and waste products
Blood Facts: 20 Fascinating Things You Didn't Know About Your Blood
Discover essential blood facts — composition, functions, donation stats, and global supply data. Everything you need to understand this life-sustaining fluid.
- ✓ Blood makes up about 7% of your body weight — adults carry roughly 10-12 pints
- ✓ Only 5% of eligible Americans donate blood, yet multiple donations supply over 80% of transfusions
- ✓ 75 million units of blood are donated worldwide each year, but access is deeply unequal
Blood Products: Types, Storage, and Medical Uses Explained
Complete guide to blood products — red cells, platelets, plasma, cryoprecipitate, and clotting factor concentrates. Learn how each is made, stored, and used clinically.
- ✓ Modern transfusion medicine uses individual blood components rather than whole blood — each product is targeted to a specific clinical need
- ✓ Red cells store for 42 days at 4°C; platelets last only 5 days at room temperature; plasma keeps a full year when frozen
- ✓ Special preparations like irradiated and CMV-negative products protect immune-compromised patients from transfusion complications
Blood Substitutes and Artificial Blood: 7 Types Researchers Are Developing
A comprehensive look at blood substitutes and artificial blood — from perfluorocarbons to transgenic proteins. What's been developed, how each works, and what obstacles remain.
- ✓ No current substitute fully replicates all functions of human blood — research focuses on oxygen-carrying capacity as the highest-priority target
- ✓ Perfluorocarbon-based products like Oxycyte can carry five times more oxygen than hemoglobin and require no blood typing
- ✓ Bovine-derived hemoglobin (Hemopure) eliminated transfusion needs in 27% of clinical trial patients
History of Blood Banking: From 1901 Discovery to Modern Safety Standards
Trace the history of blood banking from Karl Landsteiner's 1901 blood type discovery through the first blood banks, wartime innovations, and modern nucleic acid testing.
- ✓ Karl Landsteiner discovered the ABO blood group system in 1901, making safe transfusion scientifically possible for the first time
- ✓ Bernard Fantus coined the term 'blood bank' in 1936 when he established the first U.S. hospital blood bank at Cook County Hospital in Chicago
- ✓ By 1999, nucleic acid amplification testing allowed direct virus detection in donated blood — closing the window period that had caused HIV infections