invaginates

Lamina propria and muscularis mucosae have not yet invaginate in the epithelial lining which forms the fold or villus. Tunica adventitia contains many blood vessels.

可见大量处于分裂期的黏膜上皮细胞，堆积形成很厚的粘膜层，此时固有膜和黏膜肌层尚未凸起进入黏膜上皮形成皱襞或者绒毛，外膜中形成了很多血管。

In the late spermatid, one side of the acrosomal vesicle invaginates to form a PAS negative central canal.

后期精细胞在与头帽相对一端的顶体囊泡中央发生凹陷形成PAS阴性的中央管；

The nuclear membrane invaginates and lysosomes are internalized. ( 3) determination of solute concentration in various solutions by NTM;

核膜内陷，于是溶酶体被内在化。（3）各种物质溶液浓度的核孔膜测定；

The cell membrane invaginates, encloses the fluid or particles, then fuses again, forming a vesicle that later detaches and moves to the cell interior.

细胞膜先内陷关住液体或微粒，然后再次加以融合，形成小泡，小泡随后脱离细胞膜进入细胞内。

The root hair cell wall invaginates at the point of contact.

在接触点上,根毛细胞壁内凹.

The nuclear membrane invaginates and lysosomes are internalized.

核膜内陷,于是溶酶体被内在化.