WormMine: AnatomyTerm WBbt:0008600

• Definition: Muscle cell of the alimentary canal, excluding the pharynx.
• Name: enteric muscle
• Primary Identifier: WBbt:0008600

3 Children

Definition	Name	Synonym	Primary Identifier
a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents.	anal depressor muscle	dilator muscle	WBbt:0004292
a saddle-shaped muscle cell that encircles the intestinal-rectal valve	anal sphincter muscle	lineage name: ABprpppppap	WBbt:0005798
intestinal muscle cell, attach to intestine and body wall anterior to anus	intestinal muscle	stomato-intestinal muscle	WBbt:0005796

0 Expression Clusters

2 Expression Patterns

• Primary Identifier: Expr13901
• Pattern: Prib-1::gfp is broadly expressed in ectodermal and mesodermal cells during embryogenesis. A salient feature of the rib-1 expression pattern is that it is very dynamic in hypodermal cells during development. In embryogenesis, Prib-1::gfp is detected along the entire layer of hypodermoblasts that surrounds the gastrulating embryo at about 200 minutes after fertilization. By the early comma stage of embryogenesis, Prib-1::gfp is expressed at high levels in hypodermal cells of the elongating embryo, including hypodermal cells extending ventrally during ventral closure and in the two rows of dorsal hypodermal cells undergoing dorsal intercalation. Following these embryonic morphogenetic events, expression of Prib-1::gfp in the hypodermal cells of the body wall is no longer visible during larval and adult stages, except for seam cells undergoing fusion during larval development. Also, hypodermal cells of the developing vulva express Prib-1::gfp, at a low expression level in L3 larvae and at a stronger level in L4 larvae and just molted young adults, and vanishing in vulval cells in the adult. The nervous and digestive systems express Prib-1::gfp stably and continuously from embryogenesis throughout adulthood. Strong and sustained expression is seen in motorneurons, interneurons, sensory neurons (including AVM), neurons in the head and tail ganglia, with the GFP signal filling axons running along the ventral and dorsal nerve cords, commissures, and sublaterals. Expression in neurons of the ventral nerve cord and of the head ganglia is visible in 1.5-, 2-, and 3-fold embryos, and persists into adulthood. Strong expression of Prib-1::gfp is also observed in the pharynx from the 2-fold stage of embryogenesis onwards and remained strong in adults (procorpus, metacorpus, terminal bulb, grinder, and pharyngeal-intestinal valve). The anal depressor, the anal sphincter, the two enteric muscles, the spermathecae and the uterine muscles maintain expression in adults.

• Primary Identifier: Expr12239
• Pattern: Broad and possibly ubiquitous expression is first visible during gastrulation. Post-embryonically, LIN-23 reporter fusions are expressed in many but not all neurons (e.g., no expression is observed in commissural motor neurons), in body wall and enteric muscles, and in hypodermal cells. The fusion protein is excluded from the nucleus and is uniformly distributed throughout the cytoplasm. The protein also shows uniform distribution along axons. LIN-23 expression is maintained in all tissues throughout adulthood.

0 Life Stages

1 Parents

Definition	Name	Synonym	Primary Identifier
muscle of the alimentary organ system.	alimentary muscle		WBbt:0005820