Biology: Year 9 Term 3: The Circulatory System 0.0 / 5 ? BiologyCirculationGCSEAQA Created by: Charlotte HerondaleCreated on: 02-04-18 10:05 Name the 3 layers of an artery (3) Endothelium, Smooth Muscle, Thick Outer Wall 1 of 17 Why do arteries have thick walls? (1) To withstand high pressure 2 of 17 What is a capillary made of? (1) A layer of endothelial cells 3 of 17 Name the 3 layers of a vein (3) Endothelium, Smooth Muscle, Thin Outer Wall 4 of 17 What are the atria? (3) Top chambers of the heart which receive blood from veins 5 of 17 What are the ventricles? (3) Bottom chambers of the heart which send blood to the arteries 6 of 17 What is the purpose of the valves? (1) To ensure blood flow in the right direction 7 of 17 What is the septum? (3) A muscle wall dividing the chambers to prevent oxygenated and deoxygenated blood mixing 8 of 17 What are the adaptations of a red blood cell? (5) Concave, No Nucleus, Haemoglobin, Small/Flexible, Large Surface Area 9 of 17 What percentage of the blood do RBCs make up? (1) 40-45% 10 of 17 What are the 2 types of white blood cells and what do they do? (4) Lymphacytes make antibodies/antitoxins, Phagocytes engulf pathogens 11 of 17 What percentage of the blood do WBCs make up? (1) 1-3% 12 of 17 What are the adaptations of platelets? (3) No Nucleus, Clot Well, Small 13 of 17 What percentage of the blood do platelets make up? (1) 2% 14 of 17 What is plasma? (2) 90% water liquid in which the blood cells 'float' 15 of 17 What percentage of the blood does plasma make up? (1) 50% 16 of 17 What is the equation for the circulation of oxygen? (2) Haemoglobin + Oxygen -> Oxyhaemoglobin 17 of 17
Comments
No comments have yet been made