Cardiovascular System

May 20th, 2015
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Your heart, blood and blood vessels make up it. Your heart creates pressure when it beats. This pressure moves blood throughout your body. The cardiovascular system helps maintain homeostasis by performing many functions. It carries: nutrients, hormones, so on…

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Direct seeding.A common method has been widely used for long time ago by farmer in generating crop and wild plant, where seed are directly sowed to the soil after pretreatment or without pretreatment, and soil can be operated or not. Today, for forest plantation activity of Forestry Administration are mostly using seedling for planting material, which is the only one option for forest planting. In order to create more option tools for tree planting, direct seeding plot are established under cooperation between Prek Leap National School of Agriculture (PNSA), Germany organization (ded), and Cambodia Tree Seed project (CTSP). Hydroponics.A method of growingplantsusing mineralnutrientsolutions, in water, withoutsoil. Terrestrial plants may be grown with theirrootsin the mineral nutrient solution only or in an inert medium, such asperlite,gravel,mineral wool, or coconut husk.Researchers discovered in the 18th century that plants absorb essential mineral nutrients as inorganicionsin water. In natural conditions, soil acts as a mineral nutrient reservoir but the soil itself is not essential to plant growth. When the mineral nutrients in the soil dissolve in water, plant roots are able to absorb them. When the required mineral nutrients are introduced into a plant's water supply artificially, soil is no longer required for the plant to thrive. Almost anyterrestrial plant will grow with hydroponics. Hydroponics is also a sta

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