生物科技模板

1、家長開放日家長開放日編輯ppt南京九校一年三班之南京九校一年三班之走進細胞世界走進細胞世界編輯ppt講授內(nèi)容講授內(nèi)容Click to add title in here Click to add title in here Click to add title in here Click to add title in here 4123ThemeGallery is a Design Digital Content & Contents mall developed by Guild Design Inc.編輯ppt一一. 細胞發(fā)展史細胞發(fā)展史秦漢時期秦漢時期1590年年1665年年

2、17世紀前世紀前爾雅爾雅記載了記載了590多種動多種動物和植物，并納入一定的分物和植物，并納入一定的分類系統(tǒng)。類系統(tǒng)。人們試圖回答植物和動物的組人們試圖回答植物和動物的組成，但受觀察工具的限制。成，但受觀察工具的限制。一位荷蘭人用兩塊透鏡制造出一位荷蘭人用兩塊透鏡制造出了第一臺顯微鏡。了第一臺顯微鏡。英國科學家胡克用自制的顯微英國科學家胡克用自制的顯微鏡發(fā)現(xiàn)了細胞。鏡發(fā)現(xiàn)了細胞。編輯ppt細胞學說細胞學說 19世紀世紀40年代：德國科學家年代：德國科學家施萊登施萊登和和施旺施旺提出了提出了“細胞學說細胞學說”。施旺施旺施萊登施萊登編輯ppt細胞學說細胞學說 動物和植物都是由細胞構(gòu)成的；動物和植

3、物都是由細胞構(gòu)成的； 細胞是生物體結(jié)構(gòu)很功能的基本單位；細胞是生物體結(jié)構(gòu)很功能的基本單位； 細胞是由細胞分裂產(chǎn)生的。細胞是由細胞分裂產(chǎn)生的。編輯ppt二二. 認識細胞認識細胞 1. 細胞的形狀細胞的形狀 有圓的、立方形的、柱形的、菱形的、多邊形的有圓的、立方形的、柱形的、菱形的、多邊形的等多種形狀。等多種形狀。編輯ppt酵母菌酵母菌植物纖維細胞植物纖維細胞植物表皮細胞植物表皮細胞精子精子編輯ppt二二. 認識細胞認識細胞2. 細胞的大小細胞的大小細胞一般很小，只有一到幾十微米之間。細胞一般很小，只有一到幾十微米之間。編輯ppt各類細胞大小的比較各類細胞大小的比較細胞類型細胞類型直徑大?。ㄖ睆酱?/p>

4、小（um）支原體支原體0.1-0.3細菌細菌1-2動物植物動物植物10-100（多數(shù)（多數(shù)20-30）原生動物原生動物100例外，如卵細胞就特別大，鴕鳥卵細胞直徑為例外，如卵細胞就特別大，鴕鳥卵細胞直徑為5 cm，雞卵細胞為，雞卵細胞為23 cm，人卵細胞，人卵細胞為為200 m；有些神經(jīng)細胞的突起可長達；有些神經(jīng)細胞的突起可長達1 m，但細胞體的直徑不會超過，但細胞體的直徑不會超過100 m；小型；小型白細胞的直徑只有白細胞的直徑只有34 m，人的紅細胞的直徑為，人的紅細胞的直徑為7 m。編輯ppt3. 細胞的結(jié)構(gòu)細胞的結(jié)構(gòu)動物細胞動物細胞二二. 認識細胞認識細胞細胞膜細胞膜細胞核細胞核細胞

5、質(zhì)細胞質(zhì)作用：保護細胞并控制細胞作用：保護細胞并控制細胞 與外界之間物質(zhì)交換與外界之間物質(zhì)交換作用：內(nèi)含遺傳物質(zhì)，起作用：內(nèi)含遺傳物質(zhì)，起 傳宗接代作用傳宗接代作用作用：許多生命活動的場所作用：許多生命活動的場所編輯ppt細胞壁細胞壁保護和支持細胞作用保護和支持細胞作用葉綠體葉綠體內(nèi)含葉綠素，是光合作用的場所內(nèi)含葉綠素，是光合作用的場所液泡液泡內(nèi)有細胞液內(nèi)有細胞液細胞膜細胞膜細胞質(zhì)細胞質(zhì)細胞核細胞核3. 細胞的結(jié)構(gòu)細胞的結(jié)構(gòu)植物細胞植物細胞二二. 認識細胞認識細胞編輯ppt動植物細胞結(jié)構(gòu)有何不同？動植物細胞結(jié)構(gòu)有何不同？葉綠體葉綠體植物植物動物動物液泡液泡細胞壁細胞壁細胞核細胞核細胞質(zhì)細胞質(zhì)細

6、胞膜細胞膜無無無無無無有有有有有有有有有有有有有有有有有有編輯ppt任務：任務：“小小偵探家小小偵探家”公安部得到一份生物作品，從外形上分辨不出該樣品是取自公安部得到一份生物作品，從外形上分辨不出該樣品是取自植物還是動物，你能否用學過的知識將它鑒定出來？植物還是動物，你能否用學過的知識將它鑒定出來？ 動物細胞動物細胞植物細胞植物細胞細胞壁細胞壁 無無 有有細胞膜細胞膜 有有 有有 細胞質(zhì)細胞質(zhì) 有有 有有細胞核細胞核 有有 有有大的液泡大的液泡 無無 有有葉綠體葉綠體 無無 有有編輯ppt1、樟樹的莖能夠直立與植物細胞中的什么結(jié)、樟樹的莖能夠直立與植物細胞中的什么結(jié)構(gòu)有關(guān)？構(gòu)有關(guān)？2、植物的葉

7、為什么通常是綠色的？、植物的葉為什么通常是綠色的？思考思考細胞中的細胞壁由纖維素組成，具有保護和支細胞中的細胞壁由纖維素組成，具有保護和支持細胞的作用，使植物細胞有一定的形狀。持細胞的作用，使植物細胞有一定的形狀。植物的葉片細胞中具有葉綠體，內(nèi)含葉綠素。植物的葉片細胞中具有葉綠體，內(nèi)含葉綠素。編輯ppt三三. 細胞生長細胞生長生物體生長發(fā)育的過程中生物體生長發(fā)育的過程中生長生長、繁殖繁殖、衰老衰老、死亡死亡。編輯ppt分裂分裂編輯ppt 成年人全身細胞總數(shù)約成年人全身細胞總數(shù)約 1012個。個。 細胞種類有細胞種類有200 多種。這么多種類細胞均多種。這么多種類細胞均來自一個來自一個受精卵。受

8、精卵。有絲分裂有絲分裂分化分化編輯ppt 成年人全身細胞總數(shù)約成年人全身細胞總數(shù)約 1012個。個。 細胞種類有細胞種類有200 多種。這么多種類細胞均多種。這么多種類細胞均來自一個來自一個受精卵。受精卵。有絲分裂有絲分裂分化分化編輯ppt神經(jīng)細胞神經(jīng)細胞紅細胞紅細胞肌肉細胞肌肉細胞上皮組織細胞上皮組織細胞編輯ppt功能：光合作用功能：光合作用功能：保護功能功能：保護功能功能：貯藏營養(yǎng)物質(zhì)功能：貯藏營養(yǎng)物質(zhì)總結(jié)總結(jié)：同一植物體的這些細胞也都來自一群彼此：同一植物體的這些細胞也都來自一群彼此 相似的早期胚細胞。相似的早期胚細胞。編輯pptClick to edit title styleText

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