輸送血液的泵心臟第二課時血液循環(huán)的途徑ppt課件

1、七年級下冊七年級下冊 生物學生物學福州華南實驗中學福州華南實驗中學 艾先艾先54123三三四四一二3復復 習習 舊舊 知知 識識1充溢動脈血的心腔是充溢動脈血的心腔是 和和 ；2充溢靜脈血的心腔是充溢靜脈血的心腔是 和和 ；3心房與心室之間防止血液倒流的構(gòu)造是心房與心室之間防止血液倒流的構(gòu)造是 ；心室；心室與動脈之間防止血液倒流的構(gòu)造是與動脈之間防止血液倒流的構(gòu)造是 。4從心臟壁來看，從心臟壁來看， 壁最厚。壁最厚。 二二一一四四三三左心房左心房右心室右心室左心室左心室右心房右心房左心室左心室房室瓣房室瓣動脈瓣動脈瓣跟紅細胞一同來體驗血液循環(huán)之旅跟紅細胞一同來體驗血液循環(huán)之旅1、小小紅細胞走完

2、全程，幾進幾出心臟？、小小紅細胞走完全程，幾進幾出心臟？2、它走過哪些路？到了哪些地方？、它走過哪些路？到了哪些地方？3、它都做了些什么事？、它都做了些什么事？ 1、體循環(huán)和肺循環(huán)的起點和終點各是什么部位？ 2、體循環(huán)和肺循環(huán)經(jīng)過什么構(gòu)造獲得聯(lián)絡(luò)？ 3、在體循環(huán)和肺循環(huán)中，血液的成分各發(fā)生了什么變化？發(fā)生變化的部位各在哪里？ 4、嘗試畫出體循環(huán)和肺循環(huán)的途徑。小組活動小組活動血液成分的變化血液成分的變化各級各級靜脈靜脈上、上、下腔下腔靜脈靜脈右右心心房房組織細胞組織細胞O2CO2養(yǎng)料養(yǎng)料廢物廢物2、肺循環(huán)、肺循環(huán)右右心心室室肺肺動動脈脈肺部毛肺部毛細血管細血管肺肺靜靜脈脈左左心心房房肺肺 泡泡

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