Mitochondria
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Mitochondria is like the digestive system of a cell. It provides the cell with the energy it needs to survive. Depending on the type of cell will determine the amount of mitochondria it has. They take in O2 to produce sugars that the cell uses for energy. Mitochondria is made up of two membranes, almost like a cell itself, and fluid inside the second layer call, the matrix.
Chloroplasts
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Chloroplasts are similar to mitochondria, except one thing, chloroplasts only produce energy for plants. Chloroplast use the process of photosynthesis to take in sunlight and form sugars for itself. At the end of this process, O2 is released into the atmosphere. It is formed by two membrane layers and stacks of thylakoids.
Cytoplasm
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Cytoplasm is simply the fluid that fills the empty spaces where other organelles aren't. It is also called the cytosol. Although, it has one amazing job, cytoplasm contains enzymes it uses to break down Glucose into "pyruvate molecules" that can be used by mitocondria and the cell itself.
Smooth Endoplasmic Reticulum
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Smooth Endoplasmic Reticulum is like a storage warehouse for the cell. It store lipids and steroids that are needed for later use. Smooth E.R. is smooth and tube shaped and is made up of varying membranes depending on the cell.
Rough Endoplasmic Reticulum
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Like the Smooth E.R. , Rough Endoplasmic Reticulum is made up of varying membranes, but instead of being smooth (no surprise there), it is instead rough and bumpy. The Rough E.R. is like a packaging plant, it prepares proteins through the process of synthesis. What makes it "rough" are ribosomes that are attached to it.