Biological Drawings: A Few Rules

Biological Drawings: A Few Rules

Drawing biological diagrams isn’t an easy work in the park for many students. Many students are good in the descriptive part of biology, but when diagrams are concerned, they struggle. To improve your grades in biology, you must know how to draw biological diagrams in the best possible manner and most importantly, the diagrams should be as much accurate as it can get. There are a few rules for drawing accurate biological diagrams. Some of them are mentioned below.


  • You need to draw what you see, not the things that you think should be there. Improvisation isn’t a good thing in biological diagrams. You should try to improvise while you are involved with creative drawings but not in biological diagrams.
  • You should use a lead pencil, ideally a 2H for your diagrams, labels, and titles.
  • Try to make the drawings as simple as possible. Avoid sketching your diagrams, draw using clear cut lines.
  • Your drawings should preferably be done on unlined sheets (especially when you are involved in the preparation of your lab projects). If your exam sheets consist of lined papers, you can practice sketching your biological diagrams on lined sheets. Don’t forget to label your diagrams clearly because they are as significant as the diagram.
  • Avoid crowding parts in your diagrams. Biological diagrams should bear all important parts that are conspicuous enough. Your biological drawings should be large enough to present all intricate parts of the diagrams to the observer.
  • It’s advisable to keep your biological diagrams to the left of your page. The right-hand side of your page can be used for labels.
  • The labels should be done in a column on the right-hand side of the page. You should try to maintain the alignment as much as possible. The lines used for labeling should be drawn with a scale, and they should parallel to each other as much as possible.
  • The lettering used for labeling should be kept horizontal as much as possible. Vertical lettering needs to be avoided unless you are instructed to use the same.
  • Do not shade specific parts of your diagrams. It’s not a decent practice. Shading might look pretty aesthetic which it is, but it is not the rule of bio diagrams. If you want to indicate a darker area, implement dots.
  • All diagrams should be titled.
  • Multiple strokes should be avoided as much as possible. Try to draw a diagram on a single stroke to the best of your abilities.
  • Do not ever intersect the lines of your labels in your biological diagrams like the way it’s shown in the image below. It causes confusion in comprehending the parts of the diagram and is thereby, considered a poor practice.


(Image source-

  • Last but not the least; do not use a pen in your diagrams, not even for labeling your diagram.

So hope we made our point across nicely. We’ll sign off for now, but before that, we’ll like to say one more thing. Keep it clean, keep it neat and you’ll surely be able to improve your performance in biological drawings. That’s the first step to success. Best of luck!

Sudipto Das

Sudipto writes technical and educational content periodically for and backs it up with extensive research and relevant examples. He's an avid reader and a tech enthusiast at the same time with a little bit of “Arsenal Football Club” thrown in as well. He's got a B.Tech in Electronics and Instrumentation.
Follow him on twitter @SudiptoDas1993

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