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Ventilation is movement of air into and out of lungs;
volume of thorax/lungs/chest increased/decreased;
pressure in thorax/lungs/chest decreased/increased;

air flows from higher to lowe...

Enzymes are proteins that act as biological catalysts: they increase the rate of reactions without being used up themselves. A region on the enzyme, known as the active site, is very specific and compleme...

Platelets come into contact with an area of an artery wall which has become damaged, changing their shape from flattened disks to long thin projections. The platelets stick together, forming a temporary p...

Carbohydrates, as the word says, are made up of Carbon, Oxygen and Hydrogen. They are commonly known as suggarsand are present in different forms in some kind of foods.  We can divide them in different gr...

diffusion is the movement of particles from a high concentration to a low concentration through a semi permeable membrane. an example would be the movement of food molecules through the gut wall as they p...