Circulatory System notes
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This page gathers over 140 circulatory system notes, covering the heart, blood vessels and blood. Most are at secondary level, for school students studying these topics and teachers looking for material to support lessons. Choose a note to begin studying.
Notes
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Untitled Cardiovascular System Function = Transport materials TO and FROM the body's cells! Blood is MAJOR CARRIER of materials Nutrients (from DIGESTIVE SYSTEM) Oxygen (from RESPIRATORY SYSTEM) Hormones (insulin) ...
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Biology Circulation Open: e.g arthropods and most mollusks. In some, the cells are directly bathed in the haemolymph (there is no distinction between blood and interstitial fluid). In others, a heart like organ pumps haemolym...
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Untitled Edexcel SNAB AS Biology Topic 1, Unit 1- Why have a heart and circulation?INTRODUCTIONSmall organisms have a LARGE SURFACE AREA VOLUME RATIO and a LOW METABOLIC RATE.Simple DIFFUSION is effective to move substances su...
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Untitled at the arterial end of the capillary bed the blood is still at high pressure so blood plasma is forced out through the permeable walls of the capillary. Cells and proteins are too big to leave the capillary so they re...
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Circulation and the heart The blood circulation system the blood vessels (tubes that carry blood around your body) the heart (pumps blood around your body) the blood (liquid that carries blood around your body) Human beings have a double circu...
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Topic 1 Heart & Circulation The main purpose of the circulatory system is to move substances around the body. Multicellular organisms rely on a mass transport system to move substances by mass flow. They are too large for dif...
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Untitled Today, we all know that the heart is responsible for pumping blood around an organism's body and that the same blood is pumped over and over. however, for 1200 years prior to 1628, the belief was very different. it wa...
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Functions of Blood - created from Mind Map Transport Protect Organ Transplant & Tissue Rejection
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Human transport Left ventricle has a thicker wall to create a higher blood pressure to supply blood to the whole body Right ventricle wall thinner as only needs to create pressure to supply blood to lungs Arteries ...
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How HR varies Heart usually beats at 70 bpm when we exercise our muscles must release more energy and so they need more O2 for aerobic respiration To deliver more O2 the HR must inc and stroke volume must inc when we are stressed/a...
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Heart Structure. pumps blood into left ventricle from lungs prevent back flow of blood between atriums and ventricles
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The Circulatory System Blood 4 parts of blood-plasma,red blood cells,white blood cells,platelets Plasma: liquid part of blood carries chemicals(food and waste) around the body
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Topic 1- Notes 1.1What is Cardiovascular Disease?Cardiovascular diseases (CVDs)- Diseases of the HEART and CIRCULATIONThe main forms of CVD are:- Coronary heart disease (CHD)- StrokeWhy Have a Heart and Circulatory System?The heart ...
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4.4.1 Unblocking the Vessels 4.4.1 Unblocking the VesselsIn this section you will learn about: What happens to the body when blood vessels fail to deliver oxygen to the tissues? Heart attacks Stent insertion Angioplasty Coronary Artery Bypass Gra...
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Transport in Animals Page 71 Fact recall1) Large diffusion distance, small surface area = diffusion slow for demand2a) Mammalsb) Blood passes twice through the heart on one circuit around the body3a) Blood passes through the heart once on...
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4.1 Heart and Blood Steps of Blood Movement1) Oxygen-poor blood flows from the body into the right atrium of the heart.2) Blood flows through the right atrium into the right ventricle.3) The right ventricle pumps the blood to the lungs, ...
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Transport In Animals The main transport system in all mammals is the Circulatory System. It is a network of tubes -Blood Vessels and a pup -the Heart.; which keeps blood flowing all around the body.The Passage of Blood FlowThe deoxygenate...
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Atheromas and Blood clots The wall of the artery is made up of several layers. The endothelium is usually smooth and unbroken. If damage occurs to the endothelium there will be an inflammatory response. White blood cells create this inflammato...
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GCSE Biology heart notes Arteries carry blood away from the heart. They have to cope with high blood pressure so they have a thick wall made of elastic muscle fibres. Veins carry blood to the heart. They have lumen which is much bigger c...
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Blood Transport System in Mammals - created from Mind Map One circuit going from the heart to the lungs and back is the pulmonary circulation. The other circuit from the heart and the rest of the body is the systemic circulation. This is called a double circulatory system. T...
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CHAPTER 6 - Transport & Gas Exchange in Gases - created from Mind Map 6.1 - Transport in Animals 6.2 - The mammalian circulatory system The Transport System
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4.2 Heart and Blood Tests OverviewMeasure heart rate manually and with the help of computer probes and software.A heart beat is caused by the contraction of muscle cells and results in the movement of blood from the heart to the arteries and t...
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Transporting oxygen and carbon dioxide Haemoglobin can pick up four molecules of oxygen. The oxygen concentration in the red blood cells when oxygen enters the cell is relatively low. So oxygen diffuses into the red blood cells from the air in the lungs. I...
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4.3 Heart Dysfunctions What is Cholesterol?Cholesterol is a lipid that is necessary for the proper functioning of cells and maintaining a healthy body.HDL- Cholesterol that removes harmful, bad cholesterol from the inner walls of blood vess...
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CHD Coronary Heart Disease is when the coronary arteries have lots of artheromas in which restrict the blood flow to the heart. It's a form cardiovascular disease. RISK FACTORS: High blood cholesterol and poor d...
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Heart Structure Notes HeartMade of 4 chambers - 2 atria and 2 ventricles Right atrium receives deoxygenated blood from all parts of the body by the venae cavae this deoxygenated blood passes into the right ventricle and leaves by the pulmo...
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Structure of the heart Left ventricle has thicker, more muscular walls than the right ventricle. Needs to contract more powerfully to pump blood all th way round body. Right side only needs to pump to lungs (nearby) Ventricles have thicker ...
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Biology past paper questions - Animal Transport 3ai) They are biconcave discs and they have no nucleus.ii) Increases the surface area:volume ratio and no nucleus means there's more room to pack haemoglobin. b) 96 and 20 ci) Increased carbon dioxide.ii) Bohr effect....
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The Heart The cardiovascular system consists of the heart and blood vessels.The left side of the heart pumps oxygenated blood which is blood that has high oxygen and low carbon dioxide concentration. The right side of the heart...
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The Circulatory System - created from Mind Map Heart Arteries Arterioles
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Blood, Tissue Fluid & Lymph - created from Mind Map Blood Tissue Fluid Lymph
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Biology- Risk Factors of CHD Risk Factors of Coronary Heart Disease (CHD)Factors You Cannot Avoid:Increasing age - About 80% of people who die of CHD are aged 65+Gender - Men have a greater risk of CHD than women, and they have attacks earlier in...
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Biology AQA 3.2.7 The blood system circulatory system in mammals coronary artey Coronary vein
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Circulation Open Circulatory Systems - In insects and other small animals, blood circulates in large open spaces. The heart pumps blood into cavities surrounding the organs and the substances diffuse between the blood and the cel...
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CH5 - Blood Circulation onwards of the chapter Blood Circulation Circulatory system means all the vessels through which the blood flows around the body. Blood enters right atrium through vena cava, and the left atrium through the pulmonary vein at the same time. R...
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GCSE Biology heart Arteries carry blood away from the heart. They have to cope with high blood pressure so they have a thick wall made of elastic muscle fibres. Veins carry blood to the heart. They have lumen which is much bigger compar...
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Transport Mammals have double circulatory systemsThe main transport system is the blood system also known as the circulatory system. It is a network of tubes known as blood vessels. Blood flows into the left-hand sid...
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Atherosclerosis Atherosclerosis The endothelium wall becomes damaged. For example, high blood pressure can put extra strain on the cells. Toxins in the bloodstream from smoking can also cause damage to the endothelium wall. Damage to...
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The Biological basis of Heart Disease Atheroma 1. Cholesterol and other lipids collect on the inside of the coronary artery. This deposit is called an atheroma and it narrows the lumen restricting the blood flow. 2. The atheroma is then able to collect mi...
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Untitled The Circulatory System Blood Red blood cells Haemoglobin - red, carries oxygen Disc shaped, thinner at the centre No Nucleus White blood cells Contain a nucleus No definitive shape Protect against disease Platelets Ti...