BRAINCAKESurface Area to Volume Ratio
Exchange of substances with the environment takes place at the surface of an organism, but the materials absorbed are used throughout the whole volume or the organism.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- diffusion
- The net movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
More in Exchange Surfaces and Breathing
- The Need for Specialised Exchange Surfaces
- Specialised Exchange Surfaces
- The Human Gas Exchange System
- The Lungs
- Mechanism of Breathing
- Inspiration
- Expiration
- Alveoli
All 24 lessons in Exchange Surfaces and Breathing · All OCR AS-level Biology topics