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The lungs are made up of many air sacs called alveoli. The alveoli have many folds which create a large surface area.  The larger the surface area, the greater the area of alveolar cell membrane available...

Osmosis and diffusion are two words used to describe the movement of molecules. Molecules are like people. They don't like to be squashed into small areas with lots of other molecules surrounding them. Mo...

Mitosis is cell division of body cells, so is used for growth and repair. In mitosis, 2 genetically identical daughter cells are produced from the parent...

Glucose

Oxygen

They defend the body against diseases by producing antibodies