https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/v/introduction-to-the-cell 2024-05-06T19:22:43.24334365Z Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. Sal Khan video https://cdn.kastatic.org/googleusercontent/oJzMb8uFcN9RVSjYAzgspVKaATNhy5W3RvgP7f7VURoD28h2uR7JZ1EPk1bW-5e_OOUXB88nBpw0LeCg6V3APRq--w Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. https://cdn.kastatic.org/ka-youtube-converted/5KfHxF6Vhps.mp4/5KfHxF6Vhps.mp4 352 Introduction to Cell Structure https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cell-parts-and-functions/v/cell-parts-and-their-functions 2024-01-04T21:34:20.525650636Z Cell parts and their functions Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic information. The cell membrane forms the boundary that controls what enters and leaves the cell. In plant cells, chloroplasts enable photosynthesis and the cell wall provides structure. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/e8f3dd93-e6ed-4a18-9eb6-ccba71d3314c_1280_720_base.png Cell parts and their functions Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic information. The cell membrane forms the boundary that controls what enters and leaves the cell. In plant cells, chloroplasts enable photosynthesis and the cell wall provides structure. https://cdn.kastatic.org/ka-youtube-converted/TVxtlfUwIY0.mp4/TVxtlfUwIY0.mp4 254 Introduction to Cell Structure https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cell-parts-and-functions/v/comparing-animal-and-plant-cells 2022-10-21T22:40:33.613234713Z Comparing animal and plant cells Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane. Plants use cell walls to provide structure to the plant. Plant cells contain organelles called chloroplasts, while animal cells do not. Chloroplasts allow plants to make the food they need to live using photosynthesis. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/56d3be07-e2e3-4665-9da5-d5ced92c2ef9_1280_720_base.png Comparing animal and plant cells Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane. Plants use cell walls to provide structure to the plant. Plant cells contain organelles called chloroplasts, while animal cells do not. Chloroplasts allow plants to make the food they need to live using photosynthesis. https://cdn.kastatic.org/ka-youtube-converted/HjC-eMiMDfo.mp4/HjC-eMiMDfo.mp4 237 Introduction to Cell Structure https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/e/cell-structures-and-their-functions-exercise 2026-04-05T18:28:15.377289243Z Cell structures and their functions Test your knowledge of cell structures and their functions! Ashley Mucha exercise