invagination

• 名词，指向内折叠或形成套叠的状态或过程，常描述表面层形成囊袋或管状结构内陷的现象。

A noun referring to the condition or process of being folded inward or sheathed, often describing the formation of a pocket in a surface layer.

1. Folding inwardC2formalmedical

   The condition of being folded inward or sheathed, often referring to a biological process.

   内陷

   • The process of invagination occurs during the early stages of embryonic development.
   • Invagination of the cell membrane is crucial for the formation of certain organelles.
   • The surgeon observed an invagination in the intestinal wall.

   同义词infoldingintroversionintussusceptioninvolution

2. Pocket formationC2formalmedical

   The folding in of an outer layer so as to form a pocket in the surface, commonly seen in biological structures.

   内陷

   • Gastrulation begins with the invagination of the blastula wall.
   • The invagination of the neural plate forms the neural tube.
   • In some organisms, invagination creates a primitive gut.

   同义词infolding