Why is separation of oxygenated and deoxygenated blood useful?
Answer framework: Link double circulation to efficient oxygen supply and high energy needs.
All Class 10 Science notes
Chapter 5 • Biology
Life Processes
Connect nutrition, respiration, transport and excretion as the maintenance systems that keep organisms alive.
Core concepts checklist
Autotrophic and heterotrophic nutrition
Human digestion and enzyme action
Aerobic and anaerobic respiration
Transport in humans and plants
Human and plant excretion
Formula & fact bank
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy
Glucose → lactic acid + energy
Glucose → ethanol + CO₂ + energy
Diagrams to practise
Draw with pencil, use straight label lines, add arrows and write a precise caption.
- 1Human digestive system
- 2Heart and double circulation
- 3Nephron
- 4Stomata and transport in plants
CBSE examiner focus
- Label biological diagrams with correct direction arrows
- Explain structure–function links
- Compare aerobic/anaerobic respiration and arteries/veins in tables
Board-style practice
Explain urine formation in a nephron.
Answer framework: Cover ultrafiltration, selective reabsorption, tubular secretion and collecting duct flow with a labelled diagram.
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