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02.03 Cell Structure & Function.
Transcript of 02.03 Cell Structure & Function.
(The smooth and rough endoplasmic reticulum are joined together as one) Rough Endoplasmic Reticulum: Next, we have the Golgi Apparatus. The function of the Golgi Apparatus is that they send proteins to their final destinations, inside or outside of the cell. It is made up of stacks of membrane sacs. Golgi Apparatus: Smooth Endoplasmic Reticulum: The smooth endoplasmic reticulum constructs lipids, deconstructs carbohydrates, and detoxifies of substances that can harm the cell. It is smooth because it doesn't have any ribosomes on it's surface. Another thing I'd like to show you is lysosomes. They are a membrane sac containg enzymes. Their job is to provide an acidic enviroment where enzymes can digest large macromolecules without disturbing other functions important to the cell. Lysosomes: These are vacuoles. There are two types, food and water vacuoles. The food vacuoles stores food and nutrients while water vacuoles store water and molecules. In a plant cell (like the one we are in right now), there is usually one large central vacuole that takes up 80% of the cell's volume. Vacuoles This is the mitochondria. It is enclosed in a layer of two membranes. The inner layer has folds, while the outer layer is smooth. The mitochondria's job is cellular respiration,a process that uses molecules to release forms of energy (example: glucose). Mitochondria: The cell wall is very important. Animal cells do not have cell walls, but plant cells do. It is made up of polysaccharides, a mixture of cellulose, and imbedded proteins. The cell wall maintains the shape of the cell and prevents from too much water getting in or out. Cell Wall: Last but not least, we have me, the nucleus. I am a tangled mass of chromatin that looks darker than the rest of my surroundings. I contain the cell's DNA, which makes up the structure and function of the cell. Nucleus: I hope you enjoyed the tour of the plant cell. :)