---
title: "Respirometer Template – Chemistry Diagram | MolDraw"
url: https://www.moldraw.com/templates/setup-respirometer/
description: "Respirometer template: Two boiling tubes with soda lime under a gauze platform, live organisms in one and glass beads in the control, joined by a U-tube…"
lang: en
publisher: Scidart Academy
generated: 2026-10-28
---
[MolDraw](https://www.moldraw.com/) › [Templates](https://www.moldraw.com/templates/) › [Reaction setups](https://www.moldraw.com/templates/reaction-setups/) › Respirometer

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# Respirometer template

![Respirometer template: Two boiling tubes with soda lime under a gauze platform, live organisms in one and glass beads in the control, joined by a U-tube manometer of coloured liquid. A-level / AP / IB Biology.](https://www.moldraw.com/templates/setup-respirometer.webp)

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Two boiling tubes with soda lime under a gauze platform, live organisms in one and glass beads in the control, joined by a U-tube manometer of coloured liquid. A-level / AP / IB Biology.

## What the template shows

- Measure the rate of oxygen uptake by small organisms
- Bung and tubing
- Airtight; a syringe or three-way tap resets the liquid between readings
- Germinating seeds or woodlice on the gauze, kept off the soda lime
- Soda lime
- Absorbs CO₂, so the volume change is O₂ taken up. Corrosive: keep it away from organisms and skin
- Coloured liquid moves towards the organisms as they use O₂. Volume = πr² × distance moved
- Glass beads of the same volume: corrects for changes in temperature and pressure
- Constant temperature
- Stand both tubes in a water bath; leave 10 min to equilibrate before timing
- Reaction setup

Drawn with 27 shapes – every one editable in MolDraw.

## Sources

- [Nelson & Cox, Lehninger Principles of Biochemistry, 8th ed., 2021](https://openlibrary.org/isbn/9781319228002) Textbook
- [Berg, Tymoczko, Gatto & Stryer, Biochemistry, 9th ed., 2019](https://openlibrary.org/isbn/9781319114657) Textbook

## How to use this template

1. Press **Edit in MolDraw**. The template opens on the canvas of the free MolDraw editor.
2. Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need.
3. Add your own structures, arrows and text next to it, or combine several templates on one page.
4. Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers.

## Frequently asked questions

### Is the Respirometer template free?

You can preview the Respirometer template here and open and edit it in MolDraw for free. Downloading or exporting it is part of MolDraw Pro, together with the other premium templates.

### Can I edit the Respirometer template?

Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it.

### Is the chemistry checked?

Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page.

### Can I edit the glassware?

Yes. Every piece of glassware is a MolDraw apparatus object: move, resize, recolour the liquid or swap a piece and the joints stay connected.

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