How Does Your Body Make Blood?
How Does Your Body Make Blood? The blood that our hearts pump through our bodies is composed of cells and plasma. The cells include red blood cells, white blood cells...
Read MoreHow Does Your Body Make Blood? The blood that our hearts pump through our bodies is composed of cells and plasma. The cells include red blood cells, white blood cells...
Read MoreWhy Do Animals Need Oxygen? We must have oxygen to live. Every living animal cell needs oxygen for its vital metabolic activities (the process of converting fuel to...
Read MoreWhy Can You Not Breathe When You Swallow? You are not able to breathe when you swallow because your respiratory (breathing) system is closely linked to your alimentary...
Read MoreWhen Was the Stethoscope Invented? The stethoscope was invented by a French doctor, René Théophile Hyacinthe Laënnec, in 1816. It consisted of a wooden tube and was...
Read MoreWhen Was the Iron Lung Invented? In 1670, English scientist John Mayow came up with the idea of external negative pressure ventilation. Mayow built a model consisting...
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