The cards Question What does it mean to say that humans are multicellular organisms? Tap to flip Answer Their bodies are made of many cells; the human body contains millions of living cells. Question Which body system transports nutrients and waste around the body? Tap to flip Answer The circulatory system. Question What three things make up the circulatory system? Tap to flip Answer The heart, the blood vessels and the blood. Question Every cell must be supplied with substances for which three purposes? Tap to flip Answer Respiration, growth and repair. Question The circulatory system carries substances between cells and which three other body systems? Tap to flip Answer The gas exchange, digestive and excretory systems. Question In biology, what are waste products? Tap to flip Answer Products that cells no longer need. Question Which organ pumps blood through the blood vessels? Tap to flip Answer The heart. Question What is cardiac muscle? Tap to flip Answer The specialised tissue of the heart, which rhythmically contracts and relaxes together. Question How many chambers does the human heart have? Tap to flip Answer Four. Question What are the two kinds of heart chamber called? Tap to flip Answer Atria (singular atrium) and ventricles. Question What is the job of the valves in the heart? Tap to flip Answer They prevent blood from flowing backwards (backflow). Question What do the heart's four chambers and valves keep separate? Tap to flip Answer Oxygenated and deoxygenated blood. Question Why is the human circulatory system called a double circulatory system? Tap to flip Answer Blood is pumped to the lungs for gas exchange, then pumped around the rest of the body. Question What is the fluid in which blood cells are suspended called? Tap to flip Answer Plasma. Question Which substance do red blood cells use to bind and carry oxygen? Tap to flip Answer Haemoglobin. Question Give one nutrient carried in blood plasma. Tap to flip Answer For example water or glucose. Question Give one waste product carried in blood plasma. Tap to flip Answer For example carbon dioxide or urea. Question Which blood vessels carry blood away from the heart? Tap to flip Answer Arteries. Question Which blood vessels carry blood back to the heart? Tap to flip Answer Veins. Question Which narrow blood vessels allow substances to be exchanged between the blood and the tissues? Tap to flip Answer Capillaries. Question What does magnification tell you? Tap to flip Answer How many times bigger the viewed object appears compared with its actual size. Question What is a selectively-permeable membrane? Tap to flip Answer A membrane that lets some substances through but not others. Question What is diffusion? Tap to flip Answer The net movement of particles from an area of higher concentration to an area of lower concentration. Question What does 'net movement' of particles mean? Tap to flip Answer The overall movement of the particles. Question What is osmosis? Tap to flip Answer The net movement of water molecules from a high to a low concentration through a selectively-permeable membrane. Question What is active transport? Tap to flip Answer The net movement of particles against a concentration gradient, using energy. Question By which process do oxygen and carbon dioxide move into and out of the blood? Tap to flip Answer Diffusion. Question By which process does water move into and out of the blood? Tap to flip Answer Osmosis, a type of diffusion. Question By which process are large particles moved into and out of the blood? Tap to flip Answer Active transport, which requires energy. Question In diffusion and osmosis, which way does the net movement of particles go relative to the concentration gradient? Tap to flip Answer Down the concentration gradient. Question What is the surface area to volume ratio of a shape? Tap to flip Answer The relationship between the shape's surface area and its volume. Question What is an exchange surface? Tap to flip Answer A specialised surface that allows substances to be exchanged efficiently. Question Give one example of an exchange surface in the human body. Tap to flip Answer For example the alveoli in the lungs or the villi in the digestive system. Question How are human exchange surfaces adapted for the diffusion of substances? Tap to flip Answer They are adapted to maximise their surface area. Question How does the circulatory system help cells to be supplied quickly with oxygen and food molecules? Tap to flip Answer It minimises the distance these molecules have to diffuse. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Transport and exchange surfaces in humans Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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