IB Biology B3.2.1 Capillary adaptations
IB Biology B3.2.1 Capillary adaptations
Practise explaining how capillary structure supports exchange, including thin walls, permeability, narrow diameter and dense networks near tissues.
How this is tested
- explain how one-cell-thick walls shorten the diffusion path for exchanged substances
- link dense capillary networks with greater delivery of oxygen, glucose and hormones
- distinguish capillaries from other vessels using narrow diameter and permeable walls