This topic takes on average 55 minutes to read.
There are a number of interactive features in this resource:
Animations: This topic has features with which you can interact, these are usually animations. Most of the animations can be expanded to full screen size, on a new window, ideal for showing on an interactive whiteboard. The animations will play all the way through or can be viewed one section at a time.
Cells come in an enormous variety of shapes and forms, but there are two main types of cell – eukaryotic cells and prokaryotic cells.
Eukaryotic organisms include animals, fungi and plants. Almost all eukaryotic cells have some characteristics in common. They are three-dimensional, membrane-bound sacs containing cytoplasm, a nucleus and a range of membrane-bound organelles. The membrane which surrounds eukaryotic cells and the organelles is a very important structure. More detail is given on the next page.
Scanning electron micrographs can give you insight into the 3D shape of cells, while transmission electron micrographs provide details about the structure of the organelles.
Scanning (left) and transmission (right) electron micrographs of cells
The protoplasm of animal cells contain organelles that are common to most cells. Click on the diagram below to find out more about some of them.
Key features of an animal cell:
Movement of proteins from RER through the Golgi apparatus to the outside of a eukaryotic animal cell: