T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum<\/p>\n\n\n\n
Kh\u00f4ng m\u1ed9t th\u00e0nh ph\u1ed1 n\u00e0o tr\u00ean th\u1ebf gi\u1edbi hi\u1ec7n nay c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t h\u1ec7 th\u1ed1ng giao th\u00f4ng ho\u00e0n ch\u1ec9nh, c\u00f3 tr\u1eadt t\u1ef1 nh\u01b0 h\u1ec7 th\u1ed1ng tu\u1ea7n ho\u00e0n trong c\u01a1 th\u1ec3 sinh v\u1eadt.<\/p>\n\n\n\n
Ta h\u00ecnh dung hai h\u1ec7 th\u1ed1ng \u1ed1ng c\u1ed1ng – k\u00edch c\u1ee1 d\u00e0i ng\u1eafn, l\u1edbn nh\u1ecf cho \u0111\u1ebfn li ti c\u00f3 \u0111\u1ee7 – g\u1eb7p nhau t\u1ea1i m\u1ed9t tr\u1ea1m b\u01a1m trung \u01b0\u01a1ng. H\u00ecnh \u1ea3nh n\u00e0y cho ta m\u1ed9t \u00fd t\u01b0\u1edfng kh\u00e1 \u0111\u00fang v\u1ec1 h\u1ec7 th\u1ed1ng tu\u1ea7n ho\u00e0n (m\u00e1u) trong c\u01a1 th\u1ec3. M\u1ed9t h\u1ec7 th\u1ed1ng \u1ed1ng c\u1ed1ng kh\u00e1c nh\u1ecf h\u01a1n t\u1eeb tim l\u00ean ph\u1ed5i v\u00e0 t\u1eeb ph\u1ed5i v\u1ec1 tim. M\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c l\u1edbn h\u01a1n xu\u1ea5t ph\u00e1t t\u1eeb tim \u0111i t\u1edbi m\u1ecdi ph\u1ea7n trong c\u01a1 th\u1ec3. H\u1ec7 th\u1ed1ng th\u1ee9 hai n\u00e0y g\u1ed3m \u0111\u1ed9ng m\u1ea1ch, t\u0129nh m\u1ea1ch v\u00e0 mao m\u1ea1ch. \u0111\u1ed9ng m\u1ea1ch bao g\u1ed3m c\u00e1c \u1ed1ng d\u1eabn m\u00e1u t\u1eeb tim \u0111i \u0111\u1ebfn m\u1ecdi ph\u1ea7n trong c\u01a1 th\u1ec3. T\u0129nh m\u1ea1ch bao g\u1ed3m c\u00e1c \u1ed1ng d\u1eabn m\u00e1u t\u1eeb c\u00e1c b\u1ed9 ph\u1eadn trong c\u01a1 th\u1ec3 tr\u1edf v\u1ec1 tim. N\u00f3i c\u00e1ch kh\u00e1c, \u0111\u1ed9ng m\u1ea1ch d\u1eabn m\u00e1u \u201c\u0111\u1ecf\u201d – m\u00e1u ch\u1ee9a oxy, c\u00f2n \u201cs\u1ea1ch\u201d – \u0111i. T\u0129nh m\u1ea1ch d\u1eabn m\u00e1u \u201c\u0111en\u201d – m\u00e1u ch\u1ee9a carbon dioxide do c\u00e1c m\u00f4 th\u1ea3i ra v\u00e0 c\u00e1c ch\u1ea5t d\u01a1, ch\u1ea5t b\u00e3, ch\u1ea5t th\u1ea3i – tr\u1edf v\u1ec1. Mao m\u1ea1ch l\u00e0 nh\u1eefng \u1ed1ng nh\u1ecf n\u1ed1i \u0111\u1ed9ng v\u1edbi t\u0129nh m\u1ea1ch. Tr\u1ea1m b\u01a1n trung \u01b0\u01a1ng ch\u00ednh l\u00e0 tr\u00e1i tim. \u0111\u1ed9ng m\u1ea1ch n\u1eb1m l\u1eb7n trong c\u00e1c m\u00f4 tr\u1eeb \u1edf nh\u1eefng ch\u1ed7 c\u1ed5 tay, mu b\u00e0n ch\u00e2n, th\u00e1i d\u01b0\u01a1ng, d\u1ecdc theo c\u1ed5. B\u1ea5t c\u1ee9 ch\u1ed7 n\u00e0o \u1edf nh\u1eefng n\u01a1i n\u00e0y, ng\u01b0\u1eddi ta d\u1ec5 th\u1ea5y \u201cm\u1ea1ch\u201d (pulse). C\u00e1c th\u1ea7y thu\u1ed1c \u201cb\u1eaft m\u1ea1ch\u201d ch\u00ednh l\u00e0 \u0111\u1ec3 \u0111o l\u01b0\u1eddng nh\u1ecbp v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a \u0111\u1ed9ng m\u1ea1ch. \u0111\u1ed9ng m\u1ea1ch l\u1edbn nh\u1ea5t c\u00f3 \u201cvan\u201d – t\u1ee9c l\u00e0 c\u00e1i n\u1eafp \u0111\u1eady – \u1edf ch\u1ed7 \u0111\u1ed9ng m\u1ea1ch ti\u1ebfp gi\u00e1p v\u1edbi tim. C\u00e1c m\u1ea1ch m\u00e1u t\u1ee9c l\u00e0 c\u00e1c \u1ed1ng d\u1eabn m\u00e1u l\u00e0 nh\u1eefng s\u1ee3i c\u01a1 c\u00f3 t\u00ednh \u0111\u00e0n h\u1ed3i. M\u00e1u trong \u0111\u1ed9ng m\u1ea1ch c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i v\u00e0 ch\u1ea3y qua c\u00e1c \u0111\u1ed9ng m\u1ea1ch theo t\u1eebng \u201cnh\u1ecbp\u201d.<\/p>\n\n\n\n
T\u0129nh m\u1ea1ch th\u00ec n\u1eb1m g\u1ea7n s\u00e1t v\u1edbi da h\u01a1n. M\u00e1u ch\u1ea3y trong t\u0129nh m\u1ea1ch c\u00f3 m\u00e0u \u0111\u1ecf \u0111\u1eadm – ng\u01b0\u1eddi ta g\u1ecdi l\u00e0 m\u00e1u \u201c\u0111en\u201d – v\u00e0 ch\u1ea3y qua t\u0129nh m\u1ea1ch \u0111\u1ec1u \u0111\u1ec1u. Trong c\u00e1c t\u0129nh m\u1ea1ch, c\u00e1ch qu\u00e3ng l\u1ea1i c\u00f3 \u201cvan\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum Kh\u00f4ng m\u1ed9t th\u00e0nh ph\u1ed1 n\u00e0o tr\u00ean th\u1ebf gi\u1edbi hi\u1ec7n nay c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t h\u1ec7 th\u1ed1ng giao th\u00f4ng ho\u00e0n ch\u1ec9nh, c\u00f3 tr\u1eadt t\u1ef1 nh\u01b0 h\u1ec7 th\u1ed1ng tu\u1ea7n ho\u00e0n trong c\u01a1 th\u1ec3 sinh v\u1eadt. Ta h\u00ecnh dung hai h\u1ec7 th\u1ed1ng \u1ed1ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-13899","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=13899"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13899\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}