如图是鸟卵的结构示意图，请据图回答：（1）卵细胞是由图中
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解：如图为鸟卵的结构：可知1胚盘，2卵壳，3卵黄系带，4卵黄膜，5卵黄，6气室，7卵白，8卵壳膜，其中卵黄即鸟卵内部发黄的部分．鸟卵中的大多数蛋白质都集中在卵黄部分，其为胚胎发育提供营养．卵白是透明的凝胶状物体，可以为受精卵发育提供水分和部分营养；减少震荡，有保护受精卵和缓冲的作用，所以为受精卵发育成胚胎提供营养的结构有卵黄和卵白．对卵细胞具有保护作用的有：卵壳、卵壳膜和卵白．卵黄上的小白点叫做胚盘，含有细胞核，内有遗传物质，是由受精卵分裂形成的．是进行胚胎发育的部位，将来发育成雏鸟．鸟卵中卵黄、卵黄膜和胚盘合称卵细胞．所以：（1）卵细胞是由图中1胚盘、4卵黄膜，5卵黄构成，其中1胚盘里面含有细胞核，将来发育成胚胎；5卵黄是卵细胞内贮存的养料．
（2）2卵壳、8卵壳膜都具有保护卵细胞的作用．
（3）图中[3]是卵黄系带，[6]是气室．
故答案为：（1）1胚盘；4卵黄膜；5卵黄；1胚盘；5卵黄．
（2）2卵壳；8卵壳膜．
（3）卵黄系带；气室．
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绛旓細瑙ｏ細楦熷嵉鐨勭粨鏋鍜屽姛鑳濡傚浘鎵绀猴細锛1锛夌敱鍥剧ず鍙煡锛1鍗靛３锛2鍗甸粍绯诲甫锛3鍗甸粍锛4鑳氱洏锛5鍗电櫧锛6鍗靛３鑶滐紟锛2锛夎兘涓鸿儦鑳庡彂鑲叉彁渚涜惀鍏荤殑鏄3鍗甸粍鍜5鍗电櫧锛屽叾涓嵉鐧借繕鍏锋湁淇濇姢浣滅敤锛庯紙3锛夊叿鏈変繚鎶や綔鐢ㄧ殑缁撴瀯鏈夊嵉澹炽佸嵉澹宠啘銆佸嵉鐧界瓑锛庯紙4锛塠2]鏄嵉榛勭郴甯︼紝鍏朵綔鐢ㄦ槸鍥哄畾鍗甸粍锛庢晠绛旀涓猴細锛1锛夊嵉澹筹紱鍗甸粍...
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绛旓細锛1锛夛紙涓锛変腑[3]鍜屽浘锛堜簩锛変腑[7]鐨勫悕绉版槸鍗甸粍锛屼綔鐢ㄦ槸涓鸿儦鑳庡彂鑲叉彁渚涗富瑕佺殑钀ュ吇锛庯紙2锛夊浘锛堜簩锛変腑[6]鏄敱鍥撅紙涓锛変腑鐨刐5]鑳氱洏鍙戣偛鑰屾潵锛屽叾鍐呭惈鏈夛紝璇ョ粨鏋勪笌鍗甸粍鍜岃儦鐩樺叡鍚屾瀯鎴愬嵉缁嗚優锛庯紙3锛夋棦瀵瑰嵉缁嗚優璧蜂繚鎶や綔鐢紝杩樿兘涓鸿儦鑳庡彂鑲叉彁渚涙按鍒嗗拰鍏绘枡鐨勭粨鏋鏄痆4]鍗电櫧锛庢晠绛旀涓猴細锛1锛夊嵉榛勶紱...
