Drawing Cells: Skills
Drawing the ultrastructure of cells
- To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made
- Biological drawings are line pictures that show specific features that have been observed when the specimen was viewed
- There are a number of rules/conventions that are followed when making a biological drawing
Drawing conventions
- The drawing must have a title
- The magnification under which the observations shown by the drawing are made must be recorded where possible
- A scale bar may be used
- A sharp HB pencil should be used (and a good eraser!)
- Drawings should be on plain white paper
- Lines should be clear, single lines (no sketching)
- No shading
- The drawing should take up as much of the space on the page as possible
- Well-defined structures should be drawn
- The drawing should be made with proper proportions
- Label lines should not cross or have arrowheads and should connect directly to the part of the drawing being labelled
- Label lines should be kept to one side of the drawing (in parallel to the top of the page) and drawn with a ruler
- Drawings of cells are typically made when visualising cells at a higher magnification power, whereas plan drawings are typically made of tissues viewed under lower magnifications (individual cells are never drawn in a plan diagram)
- You are also expected to include the functions of organelles and cells as part of the annotations made
Examples of biological drawings
Scanning electron micrograph and drawing of a prokaryotic cell
Transmission electron micrograph and drawing of a plant cell
Examiner Tip
When producing a biological drawing, it is vital that you only ever draw what you see and not what you think you see or assume should be visible.