- May 2, 2026The ligament of Treitz (suspensory muscle of the duodenum) suspends the duodenojejunal flexure from the posterior wall, marking the anatomical…
- May 2, 2026The superficial transverse perineal muscle is a thin, variable muscle in the superficial perineal pouch, running from the ischial tuberosity…
- May 2, 2026The female bulbocavernosus (bulbospongiosus) lies on either side of the vaginal orifice, encircling it and inserting onto the clitoral body.…
- May 2, 2026The puborectalis is the innermost component of the levator ani, forming a U-shaped sling around the anorectal junction. Its tonic…
- May 2, 2026The abdominal (lumbar) portion of psoas major occupies the retroperitoneal space lateral to the lumbar vertebral bodies, forming the lateral…
- May 2, 2026The internal anal sphincter (IAS) is the involuntary smooth muscle ring surrounding the anal canal for its proximal two-thirds, responsible…
- May 2, 2026The levator ani as an abdominal (pelvic floor) muscle forms the diaphragm of the pelvic cavity, supporting the bladder, uterus/prostate,…
- May 2, 2026The gallbladder muscularis is the smooth muscle coat that enables gallbladder contraction to expel bile. Unlike the intestinal muscularis propria,…
- May 2, 2026The muscularis propria of the intestine is the functional motor apparatus of the gut, consisting of inner circular and outer…
- May 2, 2026The crural diaphragm refers specifically to the lumbar (posterior) portion of the diaphragm formed by the right and left crura,…