如图为鸟卵的结构示意图，请据图回答：（1）图中卵细胞由
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（1）（2）卵黄--卵细胞的主要营养部分；胚盘--里面含有细胞核，是胚胎发育的部位；卵黄膜，卵黄的外面有保护作用，相当于细胞膜．卵细胞由卵黄、胚盘、卵黄膜三部分组成．（3）卵黄位于细胞的中央，呈黄色，是胚胎发育的主要营养物质；卵白，卵壳膜与卵黄膜之间，为胚胎发育提供水和营养物质．
故答案为：（1）卵黄；胚盘；卵黄膜
（2）4胚盘
（3）3卵黄；5卵白
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绛旓細锛1锛夛紙2锛変笂鍥楦熷嵉鐨勭粨鏋勫浘涓悇閮ㄥ垎鐨勫悕绉板強浣滅敤渚濇鏄細鈶犲嵉澹斥憽鍗甸粍绯诲甫鈶㈠嵉榛勨懀鑳氱洏鈶ゅ嵉鐧解懃姘斿鈶﹀嵉澹宠啘鍗靛３--璧蜂繚鎶や綔鐢紝涓婇潰鏈夎澶氳倝鐪肩湅涓嶈鐨勬皵瀛旓紝鍙互閫忔皵锛屼互纭繚鍗电粏鑳炶繘琛屾皵浣撲氦鎹㈠嵉榛勭郴甯--鍥哄畾鍗甸粍鐨勪綔鐢ㄥ嵉榛--鍗电粏鑳炵殑涓昏钀ュ吇閮ㄥ垎锛庤儦鐩--閲岄潰鍚湁缁嗚優鏍革紝鏄儦鑳庡彂鑲茬殑閮ㄤ綅锛庡嵉鐧-...
绛旓細锛1锛夆憼鑳氱洏閲岄潰鍚湁缁嗚優鏍革紝鏄儦鑳庡彂鑲茬殑閮ㄤ綅锛屽皢鏉ヨ兘鍙戣偛鎴愰洀楦燂紟璇ョ粨鏋勬渶鍒濇槸鐢卞彈绮惧嵉鍒嗚褰㈡垚鐨勶紱锛2锛夊嵉榛--鍗电粏鑳炵殑涓昏钀ュ吇閮ㄥ垎锛屽嵉鐧--鍚湁钀ュ吇鐗╄川鍜屾按鍒嗭紝鎵浠ヨ兘涓洪笩鐨勮儦鑳庡彂鑲叉彁渚涜惀鍏荤墿璐鐨勭粨鏋鏈夊嵉榛勫拰鍗电櫧锛庢皵瀹ょ殑浣滅敤鏄负鑳氳儙鍙戣偛鎻愪緵绌烘皵锛庢晠绛旀涓猴細锛1锛夆憼鑳氱洏 鍙楃簿鍗 锛2锛...
