Vous pouvez également à tout moment revoir vos options en matière de ciblage. The online version of the Collins Dictionary has just been updated again, with another batch of new words and meanings inspired by the events of the summer. nécessaire] est un groupe de cellules cardiaques qui s'unissent pour amorcer les contractions et établir le rythme des battements. Space Week falls at this calendar juncture because this first October week is bookended by two key dates. The content on this website is for information only. Ce document intitulé « Pacemaker - Définition » issu de, professionnels de la santé et de la médecine, Pacemaker à 89 ans + alzheimer et diabète, Pose de pace maker sur un homme de 90 ans, Sauna : principe, bienfaits et contre-indications. All Years Les informations recueillies sont destinées à CCM BENCHMARK GROUP pour vous assurer l'envoi de votre newsletter. pacemaker 1. méd., 1975, p. 952). Learn about the different components and functions of the human circulatory system dealt with in detail in this tutorial. Copyright © 2010 by Elles seront également utilisées sous réserve des options souscrites, à des fins de ciblage publicitaire. Also called: cardiac pacemaker a small area of specialized tissue within the wall of the right atrium of the heart whose spontaneous electrical activity initiates and controls the beat of the heart We have almost 200 lists of words from topics as varied as types of butterflies, jackets, currencies, vegetables and knots! Pacemaker: A system that sends electrical impulses to the heart in order to set the heart rhythm. Create an account and sign in to access this FREE content, He has been fitted with a pacemaker and is, อุปกรณ์ไฟฟ้าที่ช่วยให้อัตราการเต้นของหัวใจสม่ำเสมอ, Medical and surgical instruments and equipment. Find out more about these processes carried out by the gastrointestinal system through this tutorial... Neurons generate electric signals that they pass along to the other neurons or target tissues. En savoir plus sur notre politique de confidentialité Download our English Dictionary apps - available for both iOS and Android. In this tutorial, you will find the basic structure of a neuron, the different classes of neurons, and membrane potentials. Today, 9 October, is the penultimate day of this year’s World Space Week, a UN event launched in 1999. All Rights Reserved. Last 10 years The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and then transferred to the internal environment by absorption. pacemaker Our new online dictionaries for schools provide a safe and appropriate environment for children. by Penguin Random House LLC and HarperCollins Publishers Ltd, a 19th-century instrument for viewing the fundus of the eye through a layer of water, which eliminates distortion caused by the cornea, a rotatable drum for holding paper on which a tracking stylus continuously records variations in blood pressure, respiratory movements, etc, a device employing suction, such as a jet pump or one for removing fluids from a body cavity, a device used to examine an internal bodily structure by the use of ultrasonic waves, esp for the diagnosis of abnormality in a fetus, an apparatus for pumping oxygen into the lungs during artificial respiration. View usage for: From moonshoot to balconing: discover the latest words added to the Collins Dictionary. 2. countable noun A pacemaker is a competitor in a race whose task is to start the race very quickly in order to help the other runners achieve a very fast time. prat. cardiac pacemaker a small mass of specialized muscle tissue in the heart that sets a rhythm of contraction and relaxation for the other parts of the heart, resulting in the heartbeat. Houghton Mifflin Harcourt. Le pacemaker, ou stimulateur cardiaque en français, est une sorte de pile reliée à un cœur malade et ayant pour fonction de provoquer les contractions cardiaques que le cœur ne peut plus assurer correctement de lui-même en lui envoyant des stimulations électriques. A biological pacemaker is one or more types of cellular components that, when "implanted or injected into certain regions of the heart," produce specific electrical stimuli that mimic that of the body's natural pacemaker cells. She was fitted with a pacemaker after suffering serious heart trouble. Usually the pacemaker site is the sinoatrial node, near the junction with the superior vena cava. 2. En médecine, un pacemaker artificiel peut être implanté pour procurer un rythme efficace lorsque le cœur est trop lent. Le malade sera revu tous les 4 mois pour contrôler: -la fréquence, -la période, -la puissance de la stimulation, permettant d'établir une courbe d'évolution de l'énergie du stimulateur (M. Perlemuter, P. Obraska, J. Quenauvilliers, Dict. There are some words that seem to be of perennial interest, so if you compare the list of words that were looked up most often in March with the words that were looked up most often in September, you will find a lot of words appearing on both lists. an electronic device implanted beneath the, Most material © 2005, 1997, 1991 by Penguin Random House LLC. © 2001-2020 BiologyOnline. Muscle cells are specialized to generate force and movement. (Science: biochemistry) A substance whose rate of reaction sets the pace for a series of interrelated reactions. de thérap. Any information here should not be considered absolutely correct, complete, and up-to-date. The mouse Clock mutation reduces circadian pacemaker amplitude and enhances efficacy of resetting stimuli and phase–response curve amplitude, Interstitial cells of Cajal in the urethra. Views expressed here do not necessarily reflect those of Biology Online, its staff, or its partners. (Science: apparatus, physiology) An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. Last 50 years Electronic pacemaker in the largest biology dictionary online. You can get a certain insight into human nature from analysing the words that people look up in dictionaries. All rights reserved. It is not intended to provide medical, legal, or any other professional advice. She was fitted with a pacemaker after suffering serious heart trouble. Last 300 years, 'Medical and surgical instruments and equipment', any of several body parts that control the rhythm of a. Webster’s New World College Dictionary, 4th Edition. All the latest wordy news, linguistic insights, offers and competitions every month. Which medical and surgical instrument or equipment am I? Modified entries © 2019 Quelques mots de remerciements seront grandement appréciés. The normal rhythm, 60 to 100 contractions per minute, increases during physical or emotional stress and decreases … pacemaker (v. ce mot II B). Vous bénéficiez d’un droit d’accès et de rectification de vos données personnelles, ainsi que celui d’en demander l’effacement dans les limites prévues par la loi. The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. 1. Last 100 years Amaze your friends with your new-found knowledge! A pacemaker is a device that is placed inside someone's body in order to help their heart beat in the right way. 'Hepatomegaly' and 'hydronephrosis' are among the most frequently looked-up words in September. Free learning resources for students covering all major areas of biology. (Science: apparatus, physiology) An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. Before using our website, please read our Privacy Policy. The pacemaker can be the normal "natural" pacemaker of the heart or it can be an electronic device. Le terme pacemaker a diverses significations : En biologie, le pacemaker cardiaque [réf. . And best of all it's ad free, so sign up now and start using at home or in the classroom.

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