Gaseous exchange surfaces 0.0 / 5 ? BiologySpecialised exchange surfacesA2/A-levelOCR Created by: Millie8282Created on: 29-01-23 09:40 One reason why large multicellular organisms need a specialised exchange surface and small organisms don’t small surface area to volume ratio 1 of 11 Humans due to movement have a high… Metabolic activity 2 of 11 They secrete mucus to trap dirt and pathogens Goblet cells 3 of 11 Waft mucus up and out of the airway Ciliates epithelium 4 of 11 The general area where the lungs are found Thorax 5 of 11 Divides into the bronchi Trachea 6 of 11 This supports the trachea and bronchi by providing support and flexibility Cartilage 7 of 11 Allows the constriction of tubes to reduce air flow Smooth muscle 8 of 11 The bronchi divides into smaller…. Bronchioles 9 of 11 Tiny air sacs where gas exchange happens efficiently. Alveoli 10 of 11 Alveoli consists of squamous epithelial tissue and what else… Elastic fibres 11 of 11
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