P2 0.0 / 5 ? BiologyCirculationCells, tissues and organsGCSEEdexcel Created by: SB290616Created on: 06-06-17 21:53 What is cell elongation and where does it occur? It happens in plants and it's where the cell expands, resulting in the growth of the plant. 1 of 17 How does growth in animals occur? Cell division 2 of 17 Define the meaning of organs A group of different tissues that work together to perform a particular function. 3 of 17 What does the right atrium receive and from which vein? The right atrium receives deoxygenated blood from the vena cava. 4 of 17 Why does the left ventricle have more muscle than the right ventricle? It needs to pump blood around the whole body whereas the right only has to pump it to the lungs. 5 of 17 What do valves do? Prevent the backflow of blood. 6 of 17 Why don't red blood cells have a nucleus? So there is room for more haemoglobin. 7 of 17 What do white blood cells produce? Antibodies and antitoxins 8 of 17 What do antitoxins do? Neutralise toxins produced by the bacterial cell. 9 of 17 The circulatory system - the heart? Vena Cava - Right Atrium - Left Ventricle - Pulmonary Artery - Lungs - Pulmonary Vein - Left Atrium - Left Ventricle - Aorta 10 of 17 What is a pentadactyl limb and what is it proof of? A limb with five digits - it is proof of evolution. 11 of 17 Name the three ways fossils are formed. Gradual replacement, impressions, preservation 12 of 17 What does plasma carry? Red and white blood cells, platelets, nutrients, carbon dioxide, urea, hormones and antibodies 13 of 17 Which vessels carry blood to the heart? Veins 14 of 17 How thick are the walls of a capillary? One cell thick 15 of 17 What is the hole down the middle of a vessel called? The lumen 16 of 17 Why do capillaries have permeable walls? So substances can diffuse in and out of cells. 17 of 17
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