生物科技講義模板市公開課金獎市賽課一等獎課件

1、南京九校一年三班之走進細胞世界第1頁講授內容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.第2頁一. 細胞發(fā)展史秦漢時期1590年1665年17世紀前爾雅記載了590各種動物和植物，并納入一定分類系統(tǒng)。人們試圖回答植物和動物組成，但受觀察工具限制。

2、一位荷蘭人用兩塊透鏡制造出了第一臺顯微鏡。英國科學家胡克用自制顯微鏡發(fā)覺了細胞。第3頁細胞學說 19世紀40年代：德國科學家施萊登和施旺提出了“細胞學說”。施旺施萊登第4頁細胞學說動物和植物都是由細胞組成；細胞是生物體結構很功效基本單位；細胞是由細胞分裂產生。第5頁二. 認識細胞 1. 細胞形狀 有圓、立方形、柱形、菱形、多邊形等各種形狀。第6頁細胞形態(tài)酵母菌植物纖維細胞植物表皮細胞精子第7頁二. 認識細胞2. 細胞大小細胞普通很小，只有一到幾十微米之間。第8頁細胞大小各類細胞大小比較細胞類型直徑大?。╱m）支原體0.1-0.3細菌1-2動物植物10-100（多數(shù)20-30）原生動物100例外

3、，如卵細胞就尤其大，鴕鳥卵細胞直徑為5 cm，雞卵細胞為23 cm，人卵細胞為200 m；有些神經細胞突起可長達1 m，但細胞體直徑不會超出100 m；小型白細胞直徑只有34 m，人紅細胞直徑為7 m。第9頁3. 細胞結構動物細胞二. 認識細胞細胞膜細胞核細胞質作用：保護細胞并控制細胞 與外界之間物質交換作用：內含遺傳物質，起 傳宗接代作用作用：許多生命活動場所第10頁細胞壁保護和支持細胞作用葉綠體內含葉綠素，是光合作用場所液泡內有細胞液細胞膜細胞質細胞核3. 細胞結構植物細胞二. 認識細胞第11頁動植物細胞結構有何不一樣？葉綠體植物動物液泡細胞壁細胞核細胞質細胞膜無無無有有有有有有有有有討論

4、：第12頁任務：“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植物還是動物，你能否用學過知識將它判定出來？ 動物細胞植物細胞細胞壁 無 有細胞膜 有 有 細胞質 有 有細胞核 有 有大液泡 無 有葉綠體 無 有第13頁1、樟樹莖能夠直立與植物細胞中什么結構相關？2、植物葉為何通常是綠色？思索細胞中細胞壁由纖維素組成，含有保護和支持細胞作用，使植物細胞有一定形狀。植物葉片細胞中含有葉綠體，內含葉綠素。第14頁三. 細胞生長生物體生長發(fā)育過程中生長、繁殖、衰老、死亡。第15頁分裂第16頁 成年人全身細胞總數(shù)約 1012個。 細胞種類有200 各種。這么各種類細胞均來自一個受精卵

5、。有絲分裂分化第17頁 成年人全身細胞總數(shù)約 1012個。 細胞種類有200 各種。這么各種類細胞均來自一個受精卵。有絲分裂分化第18頁神經細胞紅細胞肌肉細胞上皮組織細胞第19頁功效：光合作用功效：保護功效功效：貯藏營養(yǎng)物質總結：同一植物體這些細胞也都來自一群彼此 相同早期胚細胞。第20頁Click to edit title styleText in hereText in here Contents ContentsThemeGallery is a Design Digital Content & Contents mall developed by Guild Design Inc.T

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