<\/div><\/div>\r\n\r\n\r\n\r\n
Un organe bien perceptible<\/h2>\r\n\r\n\r\n\r\n
Sais-tu ce que cela signifie quand on dit que le c\u0153ur bat? Le muscle cardiaque se contracte et se rel\u00e2che: ce mouvement lui permet de pomper le sang dans tes vaisseaux sanguins. Le c\u0153ur a deux fonctions diff\u00e9rentes. Sa partie gauche est charg\u00e9e d\u2019envoyer du sang fra\u00eechement charg\u00e9 en oxyg\u00e8ne des poumons dans le corps et de lui apporter de l\u2019\u00e9nergie. La partie droite, par contre, renvoie le sang \u00abutilis\u00e9\u00bb, pauvre en oxyg\u00e8ne, vers les poumons pour qu\u2019il puisse se recharger en oxyg\u00e8ne. Tu peux sentir ton c\u0153ur battre en diff\u00e9rents endroits de ton corps. Pour cela, place simplement deux doigts sur un vaisseau, par exemple \u00e0 l\u2019int\u00e9rieur de ton poignet ou sur le c\u00f4t\u00e9 de ton cou, sous la m\u00e2choire. Sens-tu ton pouls?<\/p>\r\n\r\n\r\n\r\n
Quand le c\u0153ur bat la chamade<\/h2>\r\n\r\n\r\n\r\n
Tu as certainement d\u00e9j\u00e0 remarqu\u00e9 que ton c\u0153ur ne bat pas toujours \u00e0 la m\u00eame vitesse. C\u2019est tout \u00e0 fait normal. Si, par exemple, tu fais tes devoirs tranquillement assis(e) sur une chaise, ton corps n\u2019a pas besoin de beaucoup d\u2019\u00e9nergie et ton c\u0153ur peut se reposer. Il bat alors assez lentement: environ 85 \u00e0 90 fois par minute chez un enfant de ton \u00e2ge. Chez les b\u00e9b\u00e9s, ce sera plut\u00f4t environ 140 battements par minute et, chez les adultes, seulement 60 \u00e0 80. Le pouls d\u00e9pend donc fortement de l\u2019\u00e2ge. Mais ce n\u2019est pas tout: quand tu fais du sport, ton corps a besoin de plus d\u2019\u00e9nergie et ton c\u0153ur doit battre plus vite pour que tes organes re\u00e7oivent de l\u2019oxyg\u00e8ne. Quand tu as peur ou quand tu es tr\u00e8s excit\u00e9(e), ton pouls augmente aussi. Ton c\u0153ur peut alors vraiment \u00abbattre la chamade\u00bb (comme des coups de tambour), selon l\u2019expression consacr\u00e9e!<\/p>\r\n\r\n\r\n\r\n
Fais du bien \u00e0 ton c\u0153ur<\/h2>\r\n\r\n\r\n\r\n
Ton c\u0153ur sera content si tu manges sainement. Veille \u00e0 avoir une alimentation \u00e9quilibr\u00e9e et riche en vitamines, avec beaucoup de fruits et l\u00e9gumes frais par exemple. Les acides gras om\u00e9ga 3 sont aussi bons pour lui. On les trouve par exemple dans les noix, certains poissons et l\u2019huile d\u2019olive. Une alimentation saine n\u2019est pas si difficile \u00e0 adopter avec un peu de discipline. Et bien s\u00fbr, faire du sport r\u00e9guli\u00e8rement est aussi important pour ton c\u0153ur, car cela le fait travailler et le renforce. Alors \u00e0 vos marques, pr\u00eats, partez!<\/p>\r\n\r\n\r\n\r\n
\r\n
\r\n
Le savais-tu?<\/strong><\/h2>\r\n\r\n\r\n\r\nVoici quelques chiffres \u00e9tonnants \u00e0 propos du c\u0153ur:\u00a0<\/p>\r\n\r\n\r\n\r\n
\r\n- Le c\u0153ur d\u2019un adulte bat environ 100\u2009000 fois par jour et pompe ainsi plus ou moins 10\u2009000 litres de sang dans le corps. Le temps d\u2019une vie, cela fait trois milliards de battements en moyenne: impressionnant!<\/li>\r\n\r\n\r\n\r\n
- Le c\u0153ur de l\u2019embryon dans le ventre de sa m\u00e8re commence \u00e0 battre d\u00e8s la 4e semaine de grossesse. On peut le constater \u00e0 l\u2019\u00e9chographie.<\/li>\r\n\r\n\r\n\r\n
- Par ailleurs, notre c\u0153ur est sensible \u00e0 la musique: une musique rapide acc\u00e9l\u00e8re ses battements, tandis qu\u2019une musique calme les ralentit. \u00c9vite donc les musiques tr\u00e8s entra\u00eenantes au moment de dormir.<\/li>\r\n\r\n\r\n\r\n
- Ton c\u0153ur fait \u00e0 peu pr\u00e8s la taille de ton poing. Celui d\u2019un adulte p\u00e8se entre 250 et 300 grammes. Le c\u0153ur de la baleine bleue p\u00e8se plus de 700 kilos: l\u2019\u00e9quivalent de dix personnes de poids normal!<\/li>\r\n\r\n\r\n\r\n
- Notre c\u0153ur produit chaque jour autant d\u2019\u00e9nergie que celle n\u00e9cessaire \u00e0 un camion pour faire 30 kilom\u00e8tres. Ainsi, le c\u0153ur d\u2019une personne de 70 ans a produit assez d\u2019\u00e9nergie pour qu\u2019un camion fasse l\u2019aller-retour de la Terre \u00e0 la lune.<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n","protected":false},"excerpt":{"rendered":"
Le c\u0153ur est un organe important. Il est charg\u00e9 de […]<\/p>\n","protected":false},"author":9,"featured_media":20131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[773,775],"tags":[],"class_list":["post-23815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coeur-et-circulation-sanguine","category-sante-des-organes"],"acf":[],"yoast_head":"\n
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