Whole of Organisms Exchange Substances with their Environment | A-Level Biology Paper 1 | AQA

Everything needed for unit 3: Organisms Exchange Substances with Their Environment. This AQA A-Level Biology video covers how organisms exchange gases, nutrients and waste, with explanations and visual aids to help with exam revision. Watch units 5 to 8 for year two A level biology on TheScienceBreak.com/a-level-biology 📌 Topics covered in this video include: Surface area to volume ratio and its importance in exchange processes Gas exchange mechanisms in insects, fish and humans Human circulatory system and a breakdown of the cardiac cycle Mass transport in animals and plants, including the oxygen dissociation curve and Bohr effect Translocation in plants via mass flow, with ringing experiments and tracer use explained This summary is perfect for quick revision Time stamps 0:22 - Surface area to volume ratio 04:14 - Gas exchange in insects 07:28 - Gas exchange in fish and the counter current mechanism 10:36 - Gas exchange in leaves 12:29 - Adaptation in xerophytes 14:53 - Gas exchange in humans 18:05 Digestion and absorption 24:48 - Mass transport in animals 33:40 - Circulation in mammals 37:40 - Structure of arteries and veins 40:53 - Formation of tissue fluid 42:48 - Mass transport in plants Visit TheScienceBreak.com/a-level-biology for a full revision, practice and tracking system which includes all the year 13, paper 2 Biology units The videos are planned, recorded and edited by science teacher, Kishore Vyas. Also, check out: Instagram:   / thesciencebreak   Facebook:   / thesciencebreak   Twitter:   / thesciencebreak