amnioserosa maintenance

Maintenance of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis.

lumen formation, open tracheal system

Creation of the central hole of a tube in an open tracheal system through which gases flow.

mammary gland duct cavitation

Creation of the central hole of the mammary gland duct by the hollowing out of a solid rod.

suture of dorsal opening

Closure of the dorsal hole. Filopodia extending from each leading edge interdigitate at the dorsal midline and appear to prime the formation of adherens junctions between the two rows of leading edge cells. Newly formed septate junctions are also used to seal the dorsal hole.

closure of embryonic heart tube

Creation of the central hole of the embryonic heart tube by sealing the edges of an epithelial fold.

tube formation

Creation of the central hole of a tube in an anatomical structure through which gases and/or liquids flow.

tube closure

Creation of the central hole of a tube in an anatomical structure by sealing the edges of an epithelial fold.

apoptotic process involved in tube lumen cavitation

Any apoptotic process that contributes to the hollowing out of an epithelial rod or cord to form the central hole in a tube.

semicircular canal fusion

Creation of the central hole of the semicircular canal by sealing the edges of the pouch that forms during the process of semicircular canal formation.

amnioserosa formation

Formation of the amnioserosa, an epithelium that occupies a hole in the embryonic dorsal epidermis. This occurs by the transformation of a narrow strip of cells at the dorsal midline of the blastoderm from columnar to squamous cells, accompanied by a lateral shift.