![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/05\/bai-2-trang-85-sgk-sinh-11.png\")
<\/div>\nB\u00e0i 3 (trang 85 SGK Sinh 11):<\/b>\u00a0T\u1ea1i sao huy\u1ebft \u00e1p l\u1ea1i gi\u1ea3m d\u1ea7n trong h\u1ec7 m\u1ea1ch?<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Huy\u1ebft \u00e1p gi\u1ea3m d\u1ea7n trong h\u1ec7 m\u1ea1ch do: m\u00e1u t\u1eeb tim v\u00e0o \u0111\u1ed9ng m\u1ea1ch v\u1edbi m\u1ed9t \u00e1p l\u1ef1c l\u1edbn nh\u1edd s\u1ef1 co b\u00f3p \u0111\u1ea9y m\u00e1u c\u1ee7a tim. \u00c1p su\u1ea5t c\u1ee7a m\u00e1u l\u00ean \u0111\u1ed9ng m\u1ea1ch ch\u1ee7 l\u00e0 l\u1edbn nh\u1ea5t do to\u00e0n b\u1ed9 l\u01b0\u1ee3ng m\u00e1u t\u1eeb tim ch\u1ec9 \u0111\u01b0\u1ee3c d\u1ed3n v\u00e0o m\u1ed9t \u0111\u1ed9ng m\u1ea1ch ch\u1ee7. T\u1eeb \u0111\u1ed9ng m\u1ea1ch ch\u1ee7 s\u1ebd ph\u00e2n ra c\u00e1c \u0111\u1ed9ng m\u1ea1ch l\u1edbn r\u1ed3i ph\u00e2n ra c\u00e1c ti\u1ec3u \u0111\u1ed9ng m\u1ea1ch v\u00e0 t\u1edbi c\u00e1c mao m\u1ea1ch sau \u0111\u00f3 t\u1edbi ti\u1ec3u t\u0129nh m\u1ea1ch v\u00e0 t\u0129nh m\u1ea1ch ch\u1ee7. Khi m\u00e1u t\u1eeb m\u1ed9t m\u1ea1ch l\u1edbn \u0111\u01b0\u1ee3c ph\u00e2n v\u00e0o c\u00e1c m\u1ea1ch nh\u1ecf h\u01a1n th\u00ec \u00e1p l\u1ef1c c\u1ee7a m\u00e1u l\u00ean th\u00e0nh m\u1ea1ch s\u1ebd gi\u1ea3m d\u1ea7n (huy\u1ebft \u00e1p gi\u1ea3m d\u1ea7n).<\/p>\n
B\u00e0i 4 (trang 85 SGK Sinh 11):<\/b>\u00a0Gi\u1ea3i th\u00edch s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 m\u00e1u trong h\u1ec7 m\u1ea1ch.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
– S\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 m\u00e1u trong h\u1ec7 m\u1ea1ch li\u00ean quan ch\u1ee7 y\u1ebfu \u0111\u1ebfn t\u1ed5ng ti\u1ebft di\u1ec7n c\u1ee7a m\u1ea1ch v\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch huy\u1ebft \u00e1p gi\u1eefa hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch.<\/p>\n
– T\u1ed1c \u0111\u1ed9 m\u00e1u t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi t\u1ed5ng ti\u1ebft di\u1ec7n c\u1ee7a m\u1ea1ch. T\u1ed5ng ti\u1ebft di\u1ec7n c\u1ee7a m\u1ea1ch c\u00e0ng l\u1edbn th\u00ec t\u1ed1c \u0111\u1ed9 ch\u1ea3y c\u1ee7a m\u00e1u c\u00e0ng nh\u1ecf. Trong h\u1ec7 th\u1ed1ng \u0111\u1ed9ng m\u1ea1ch, t\u1ed5ng ti\u1ebft di\u1ec7n t\u0103ng d\u1ea7n n\u00ean t\u00f4c \u0111\u1ed9 m\u00e1u gi\u1ea3m d\u1ea7n. Mao m\u1ea1ch c\u00f3 t\u1ed5ng ti\u1ebft di\u1ec7n l\u1edbn nh\u1ea5t n\u00ean m\u00e1u ch\u1ea3y v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm nh\u1ea5t. Trong h\u1ec7 th\u1ed1ng t\u0129nh m\u1ea1ch, t\u1ed5ng ti\u1ebft di\u1ec7n gi\u1ea3m d\u1ea7n n\u00ean t\u1ed1c \u0111\u1ed9 m\u00e1u t\u0103ng d\u1ea7n.<\/p>\n
– Hai \u0111\u1ea7u m\u1ea1ch c\u00f3 \u00e1p su\u1ea5t ch\u00eanh l\u1ec7ch. Khu v\u1ef1c ti\u1ebfp gi\u00e1p c\u1ee7a m\u1ed9t m\u1ea1ch v\u1edbi m\u1ea1ch c\u00f3 ti\u1ebft di\u1ec7n l\u1edbn h\u01a1n ho\u1eb7c nh\u1ecf h\u01a1n g\u1ecdi l\u00e0 hai \u0111\u1ea7u m\u1ea1ch. \u1ede \u0111\u00e2y, do s\u1ef1 t\u1eadp trung ho\u1eb7c s\u1ef1 ph\u00e2n t\u00e1ch c\u1ee7a d\u00f2ng m\u00e1u s\u1ebd t\u1ea1o n\u00ean s\u1ef1 ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t so v\u1edbi d\u00f2ng m\u00e1u trong m\u1ea1ch. Do v\u1eady n\u00ean c\u00f3 t\u00e1c \u0111\u1ed9ng l\u00ean t\u1ed1c \u0111\u1ed9 m\u00e1u.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 85 SGK Sinh 11):\u00a0T\u1ea1i sao tim t\u00e1ch r\u1eddi kh\u1ecfi c\u01a1 th\u1ec3 v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng co d\u00e3n nh\u1ecbp nh\u00e0ng? L\u1eddi gi\u1ea3i: Tim t\u00e1ch r\u1eddi kh\u1ecfi c\u01a1 th\u1ec3 v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng co d\u00e3n nh\u1ecbp nh\u00e0ng trong dung d\u1ecbch sinh l\u00ed m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh l\u00e0 nh\u1edd c\u00f3 h\u1ec7 d\u1eabn truy\u1ec1n […]<\/p>\n","protected":false},"author":3,"featured_media":30338,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1324],"tags":[1486,1485],"yoast_head":"\n