DNA contains the genetic code which is translated into proteins. It does this as it is the site of the cell's DNA. Nucleus: The nucleus controls everything which takes place in the cell. We'll learn more about this in the transport topic. The cell membrane is often described as "selectively permeable" as it allows some but not all substances across (permeable) and can choose which substances can pass across (selective). Many of the cell's chemical reactions occur in the cytoplasm.Ĭell membrane: The cell membrane contains the contents of the cell and provides a barrier to control what enters and leaves the cell. It consists mainly of water and has many different substances dissolved in it. These include.Ĭytoplasm: The cytoplasm is the liquid part of the cell. You also need to learn about two other organelles which are found in the cytoplasm of animal cells.Ī typical animal cell has the common structures shown in the diagram above. In this course you need to learn more about the functions of the cell membrane and the nucleus. You already know that animal cells consist of a cell membrane, nucleus and a fluid cytoplasm. However, first we'll consider what the typical structures of most animal cells are. However, don't forget that cells exist in 3D and not only that, their structures move!Īnimal cells have many different structures depending on their function. We'll use the 2D cut-through cell diagrams you're used to to help explain where these structures are, what they look like and what they do. You will already know some of these structures and what they do, but in this topic we're going to take this much further. ![]() ![]() Every cell consists of an intricate system of different structures which all work together to allow the cell to function. But, what is a cell made of? Lots of things. Using examples from typical plant, animal, fungi and bacteria cells.Īll living things are made of cells. Cell ultrastructure and functions to include:
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