blastopore 

  1. 名詞
胚孔, 原口
/此名詞複數為"blastopores"/

    
                        
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例句

                

                    
    
                                                    
  1. 
                                In protostomes, the blastopore becomes the mouth.                            
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  2. 
                                The one exception is the anterior portion of the dorsal blastopore lip.                            
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  3. 
                                The entrance to this is known as the blastopore and it will later develop into the anus.                            
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                                In most animals, a blastopore is formed at the point where cells are entering the embryo.                            
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                                However, in bryozoans the blastopore closes, and a new opening develops to create the mouth.                            
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