At a glance
Key signals
0% cross fields · reaches 11 more
- Biology
- Chemistry
- Explanation
- Examples
- Misconception
- Sourced relations 9
- Attribution
Dependencies
What this concept builds on and what it makes possible — derived from the atlas’s dependency, causal and structural relations, not from every related edge.
Foundations · builds on
Gas exchangeenablesCellular respirationEstablished
gas exchange enables Cellular respiration.
Mechanism: Gas exchange feeds cellular respiration: it supplies the oxygen cells burn and removes the carbon dioxide they produce.
- Biology 2e (OpenStax) (2018) verified
Cellular respirationrequiresGlucose (sugar)Established
Cellular respiration requires glucose.
Mechanism: Respiration breaks the bonds in glucose to release the stored chemical energy for the cell to use.
- Campbell Biology — demonstrates this case · verified · moderate evidence · Cellular respiration oxidises glucose to release its stored chemical energy. (9 — Cellular Respiration and Fermentation)
MitochondrionenablesCellular respirationEstablished
mitochondrion enables Cellular respiration.
Mechanism: The mitochondrion is the organelle where cellular respiration releases energy from glucose.
- Biology 2e (OpenStax) (2018) verified
Cellular respirationrequiresOxygen (O₂)Established
Aerobic respiration requires oxygen.
Mechanism: Oxygen is the final electron acceptor, allowing energy to be released efficiently.
- Campbell Biology — demonstrates this case · verified · moderate evidence · Oxygen is the terminal electron acceptor of aerobic respiration. (9 — Cellular Respiration and Fermentation)
Enables · leads to
Cellular respirationcausesATPEstablished
Cellular respiration causes adenosine triphosphate.
Mechanism: Cellular respiration's whole purpose is to make ATP from the energy stored in glucose.
- Biology 2e (OpenStax) (2018) verified
Carbon dioxide (CO₂)is derived fromCellular respirationEstablished
Respiration releases carbon dioxide.
Mechanism: As glucose is broken down, its carbon is released to the air as CO₂ — the reverse of photosynthesis's uptake.
- Campbell Biology — demonstrates this case · verified · moderate evidence · Carbon dioxide is a product of the oxidation of glucose. (9 — Cellular Respiration and Fermentation)
System context
Cellular respirationis part ofCarbon cycleEstablished
Respiration is part of the carbon cycle.
Mechanism: Respiration is a flow returning carbon to the atmosphere as CO₂.
- NOAA — The Carbon Cycle (educational resource) — demonstrates this case · needs-check · moderate evidence · Respiration returns carbon to the atmosphere, closing the biological loop of the carbon cycle.
Cellular respirationis part ofMetabolismEstablished
Cellular respiration is part of metabolism.
Mechanism: Cellular respiration is a core part of metabolism: it breaks down glucose with oxygen to release the energy that powers the cell's other reactions.
- Biology 2e (OpenStax) (2018) verified
Glycolytic processis part ofCellular respirationEstablished
glycolytic process is part of Cellular respiration.
Mechanism: Glycolysis is the first stage of cellular respiration, splitting glucose into pyruvate.
- Biology 2e (OpenStax) (2018) verified
Tricarboxylic acid cycleis part ofCellular respirationEstablished
Open Tricarboxylic acid cycle →
tricarboxylic acid cycle is part of Cellular respiration.
Mechanism: The citric acid cycle is the central stage of cellular respiration, extracting energy-rich electrons from food to drive ATP production.
- Biology 2e (OpenStax) (2018) verified
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
Builds on 4 foundations (requires / depends-on / derived-from / emerges-from).
structural · Structural graph analysis — not a claim of importance, causation or history.
Directly enables 1 concept; following enables/causes relations, 1 concept is downstream across 2 disciplines.
structural · Follows only enables/causes dependency edges — not general relatedness.
Currently dark in the atlas: no key date stored · 8 of 12 of its relations lack claim-level evidence.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
Structural neighbourhood: 12 → 58 → 148 concepts reachable within 3 hops.
structural · Structural reach — being reachable is not the same as being understood.
cross-field
12 within-field, 0 cross-field
Strengths & constraints
Constraints
- No dated history stored — the atlas records no key date for this concept. atlas representation
Conditions
- Its dependency reading rests on 4 foundation relations. structural
- Read structurally — most of its relationships carry no external evidence yet, so claims here are graph-derived. structural
Dependency radial
What this concept builds on (left) and what it makes possible (right) — derived from dependency and causal relations.
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Photosynthesis, Carbon cycle, Metabolism and Glucose (sugar).
Through this lens it connects to Photosynthesis, Carbon cycle, Glucose (sugar) and Carbon dioxide (CO₂).
What it looks like
Concrete cases that make this idea recognisable in the real world.
Why you breathe harder when you run
When you sprint, your muscles need energy fast, so they respire glucose more quickly. That uses more oxygen and produces more carbon dioxide — which is why your breathing and heart rate climb.
Check yourself
A quick check against a common misconception. Nothing is scored — picking the tempting-but-wrong answer just flags an idea worth revisiting.
Which statement is correct?
Only animals respire; plants only photosynthesise.
All living cells respire, including plant cells, at all times.
Look for: Learner treats respiration as an animal-only process and is surprised that plants respire.
Where you'll meet it
Journeys that walk you through this idea. You may recognise it from more than one.
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Energy transformation35 disciplines · 48 concepts
Concepts
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
Curriculum alignment
Austria · AHS Unterstufe (Sekundarstufe I) · Biologie und Umweltbildung
Appears in official curriculum objectives
Understand the role of oxygen in using nutrients as energy carriers. · 3. Klasse (7. Schulstufe)
Exact wording: „Tracheen, Kiemen und Lungen als Atmungsorgane, Bedeutung des Sauerstoffs bei der Nutzung von Nährstoffen als Energieträger“
How this official objective connects, through canonical knowledge, to what a learner actually does — each link is real data, never a coverage claim.
Canonical concept
- How each concept relates to the objective
- named — The objective's own wording names this concept.
- required — You must grasp this concept to meet the objective.
Relations & mental models
1 canonical relations connect these concepts
- Cellular respiration requires Oxygen (O₂)
Mental models these concepts carry: Energy transformation ×2Stocks and flowsActivity → Observable evidence
No pilot activity yet engages these concepts directly.
The curriculum does not name “cellular respiration” verbatim; the O₂-dependent use of nutrients as energy carriers is its physiological core.
Provenance
- Authority
- BMBWF
- Document
- BGBl. II Nr. 1/2023
- Section
- Anlage A zu Art. 4 · Biologie und Umweltbildung · Anwendungsbereiche, 3. Klasse (S. 113)
- Version
- Stammfassung, Kundmachung 2. Jänner 2023
- School type
- AHS Unterstufe (Sekundarstufe I)
- Subject
- Biologie und Umweltbildung
- Stage
- lower-secondary
- Accessed
- 2026-09-17
✓ Source verified
Pilot slice: mapped to selected official objectives, not a coverage claim. Concept identity is canonical and never redefined by a curriculum.
Respiration is how living cells release energy from glucose. It uses oxygen and releases carbon dioxide and water — almost the reverse of photosynthesis.
Mental models at work here
- Connects 12 other ideas across 2 disciplines.
- A cross-disciplinary bridge — its connections reach into 11 other fields.
- Most of its connections are of the “Kind & structure” kind.
- It exercises 1 reusable thinking pattern.
- It supports 1 curriculum objective.
- It features in 1 learning journey.
Derived from the graph’s real structure — observations, not a score.
Sources
- Campbell Biology (2021) verifiedmoderate evidence