新陳交替的解釋

新陳交替的解釋
「陳」和「舊」兩字相通，【新陳交替】亦作【新舊交替】，而樓上網友寫作【新陳代謝】其實都可以，意思都差不多。
在生物範疇則指生物體從外界取得生活必須的物質，通過物理化學作用變成生物體的有機組成部分。供給生長、發育，同時產生能量維持生命活動，並排除廢物的過程。
而在哲學範疇則指新事物代替舊事物的過程。任何事物的內部都有其新舊兩方面的矛盾，形成為一系列曲折的鬥爭。鬥爭和交接的結果，新的方面由小變大，上昇為支配的部分，相反舊的方面則由大變小，變成逐步歸於滅亡的部分。而當新的部分取代舊的部分支配者地位的時候，舊事物的性質就變化成為新事物的性質。
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新陳代謝呀????
Metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. These processes allow organisms to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is usually divided into two categories. Catabolism breaks down large molecules, for example to harvest energy in cellular respiration. Anabolism, on the other hand, uses energy to construct components of cells such as proteins and nucleic acids.
The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed into another by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable but thermodynamically unfavorable reactions by coupling them to favorable ones. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells.
The metabolism of an organism determines which substances it will find nutritious and which it will find poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals.The speed of metabolism, the metabolic rate, also influences how much food an organism will require.