Tag: science & technology

White blood cells (leukocytes) are the immune system's primary defense against infections and foreign invaders. RBCs carry oxygen, platelets help with clotting, and 'none of the above' is incorrect since WBCs do fight disease.

The liver acts as the body's primary filtration system, removing toxins, drugs, and waste products from the blood before it circulates to the rest of the body. While kidneys also filter blood (removing urea for excretion), the liver is the first-pass filter for most harmful substances absorbed from the digestive tract. The heart pumps blood and the intestine absorbs nutrients.

The ABO blood group system classifies human blood into four main types based on the presence or absence of A and B antigens: Type A has A antigens, Type B has B antigens, Type AB has both, and Type O has neither. This classification is crucial for safe blood transfusion, as mixing incompatible blood types can cause dangerous immune reactions.

Diabetes mellitus is a metabolic disorder characterized by persistently elevated blood glucose levels. This occurs when the pancreas produces insufficient insulin or when the body cannot effectively use the insulin it produces, leading to dangerous hyperglycemia if untreated.

Blood transfusion is the medical procedure of transferring blood or blood components from one person (donor) into another person's (recipient's bloodstream. This is done to replace lost blood during surgery, treat certain diseases, or restore blood cell counts. Clotting is a different process where blood forms solid clots to stop bleeding.

The Georgia typeface was commissioned by Microsoft in 1996 as a serif font that would display well on computer screens. It was named after a tabloid headline 'Alien heads found in Georgia' that the typeface designers saw, which they found amusing and memorable. Georgia is one of the core web fonts and was designed by Matthew Carter. Vermont, Montana, and Hawaii are US states but are not the names of this famous Microsoft typeface.

Prince of Persia, created by Jordan Mechner in 1989, featured animations based on photographs of Mechner's brother David running and jumping. This technique gave the game its remarkably fluid and realistic character animations for the time. Dangerous Dave, Pong, and Pac-Man did not use this motion-capture method.