oxygen & nutrients   - need to be absorbed to be used in respiration  , carbon dioxide  - a waste material that need to be removed from cells  , efficiency of absorption  - is increased by having large surface are, thin walls and rich blood supply  , capillary network    - ensures all cells are in close proximity to the blood supply  , alveoli   - the site of gas exchange in lungs  , oxygen   - diffuses from alveoli to blood  , carbon dioxide  movement in lungs - diffuses from blood to alveoli  , glucose   - product of breakdown of starch, absorbed into blood capillary in villi  , amino acids   - products of breakdown of protein, absorbed into blood capillary in villi  , fatty acids and glycerol   - products of breakdown of fats, absorbed into lacteal in villi  , villi   - finger-like projections in small intestines for absorption  , lacteal - transport vessel in villi,

N5 Bio 2.7 Absorption of materials

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