leaf functions
The leaves perform the functions of photosynthesis, respiration and perspiration.
Photosynthesis
Monday, February 22, 2010
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vegetables consist of organic substances (containing carbon). The living environment is made up of inorganic substances (water, salts, carbon dioxide). Are capable of transforming inorganic substances into organic. By green plant photosynthesis (with chlorophyll) in the presence of sunlight (energy source) are able to draw ambient air carbon dioxide, combining inorganic substances (water, mainly), creating or synthesizing organic substances containing carbon and water.
This function removes oxygen through the stomata. While the raw sap carries minerals, the sap has made organic substances formed by the blade and all bodies that have chlorophyll. form the first organic substances (Starch and sugar) to get other new substances and combinations of existing water and mineral salts that it carries in solution.
To carry out photosynthesis is essential that the plant has:
Chlorophyll
Sunlight
, because without it the plant lacks the power to transform minerals into organic substances.
Heat
for the transformation of substances and reactions that occur in cells, plants need an optimal temperature that varies in each species. In general the temperature increase activates all functions, but after the optimal temperature, decrease in intensity.
Carbon Dioxide
essential for the synthesis of organic matter. Importance of photosynthesis
is a condition of the permanence of life on earth. Organic substances are produced that feed the plants and animals and obtained the elements and the energy required to form the constituent substances. For the breath of man and animals, and by the combustion, the atmosphere is continually charged carbon dioxide, in the absence of photosynthesis by which plants assimilate huge amounts of the gas producing oxygen, to the time when it would be impossible to breathe.
Breathing
Breathing is a function of nutrition by which the plant absorbs ambient oxygen and exhale carbon dioxide, with energy and water. The performance of all its cells. They also involve enzymes that facilitate chemical reactions. The mechanism of respiration is the reverse of photosynthesis.
Photosynthesis
absorbs carbon dioxide and exhale oxygen.
produces organic materials and stores energy.
ago synthesis of simple compounds is made more complex compounds.
The green bodies made from the plant 
Breathing
absorbs oxygen and exhales carbon dioxideoxidizes, ie burning organic matter , which decomposes and releases energy.
ago analysis, ie to reduce the complex compounds simpler compounds.
The all the organs of the plant.
temperature and respiration
The temperature affects the respiratory, as well as age or type of plant. Gradually increasing the temperature to 45 ° C the respiratory rate increases. If you reach 50 ° C the plant dies quickly.
Transpiration
Transpiration is a function of nutrition through which the plant is apparent, as excess water absorbing roots.The root hairs allow the entry of an excessive amount of water needed to dissolve the salts in the soil.
This excess water is beneficial for the circulation of the sap rising, it makes it less dense, but is unnecessary and even harmful to the plant, so it removes it as a vapor in transpiration.
Some external factors influencing higher transpiration intensity: the lower humidity of the atmosphere, increased temperature and wind, increasing water availability in the soil also internal factors: age of plant, number of stomata, epidermal tissue thickness and permeability of this, and the simultaneous realization of photosynthesis.
Exudation
When the environment saturated with humidity prevents sweat to the plant, it removed the excess water through the stomata aquifers, which operate only in these cases, the excess water out as droplets, which appear at the end of the ribs, where are these stomata.
For plant removes perspiration distilled water and salt water exudation.
Photosynthesis
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