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Cell Structure Essay

882 words - 4 pages

Every living thing on Earth has cells. Cells are made up of small pieces called proteins and organelles. The larger pieces are tissues and systems. Cells hold biological equipment that keeps them alive. A cells job is to organize. Each cell has a different function. Organisms grow and survive better when cells are present. If people were only made up of one cell they could only grow to one size. You also would not have a nervous system or muscles. A person’s body is made up of trillions of cells. Animal-like cells differ from plant-like cells. An animal-like cell could be a tiny microorganism or a nerve cell. Plant cells differ because they have protective structures with walls. Each ...view middle of the document...

Muscles interact with our nervous system.
If a cell doesn’t have a job it is not needed. They all have a purpose and that purpose is to survive. If any cell is missing a piece it would die. All the pieces of a cell are called organelles. Complex molecules make up organelles and that is what keeps cells alive. If a cell is growing it needs more organelles than a smaller cell. Mitochondria help cells process food into energy. A larger cell would need more mitochondria than a smaller cell. Cells that are more advanced do not survive well on their own. Cells that are not advanced could live on their own.
Animal and plant cells differ. If you are not an animal or a microbe you would be a plant. Plants have a classification system that is similar to that of an animal. All plants have photosynthesis in common. This process is how plants take energy and create sugar. Some plants do not use this process. The species of plants that are parasites do not use this process. All plants have cell walls. When plants use photosynthesis they store energy to be used later. Plants release energy using respiration and they store it using photosynthesis and to do this they need the sun. Plants are used in the study of genetics. A scientist actually studied plants to get some ideas of how traits are passed from one generation to the next. Because we use plants as food scientists...

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