Part A:Stomatal pore

Function: It allows a plant to take in carbon dioxide or participate in gaseous exchange, needed for photosynthesis. It also helps to reduce water loss by evaporation i.e. checks excess of transpiration (excess water loss through aerial parts of the plant in form of water vapor).

Part B: Guard cells

Function: These are specialized cells. The opening and closing of the stomata or the stomatal pore is controlled by the guard cells.

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In the body, fats are digested in the small intestine. The small intestine receives secretions from the liver (bile) and the pancreas. Bile breaks down the large globules of fat into smaller globules of fat (on which pancreatic enzyme can now work on) and this process is called emulsification of fats. The intestinal wall secretes intestinal juices and along with the pancreatic enzymes, further break down the fat globules to fatty acids and glycerol.