Muscularis mucosae

The lamina muscularis mucosae is a thin layer of muscle of the gastrointestinal tract, located outside the lamina propria, and separating it from the submucosa. It is present in a continuous fashion from the esophagus to the upper rectum. A discontinuous muscularis mucosae–like muscle layer is present in the urinary tract, from the renal pelvis to the bladder; as it is discontinuous, it should not be regarded as a true muscularis mucosae.

Optic cup (embryology)

During embryonic development of the eye, the outer wall of the bulb of the optic vesicles becomes thickened and invaginated, and the bulb is thus converted into a cup, the optic cup, consisting of two strata of cells. These two strata are continuous with

Pisiform joint

The pisiform joint is a joint between the pisiform and triquetrum

Intermetatarsal joints

The intermetatarsal joints are the articulations between the base of metatarsal bones

Pararectal fossa

In the male, the peritoneum encircles the sigmoid colon, from which it is reflected to the posterior wall of the pelvis as a fold, the sigmoid mesocolon. It then leaves the sides and, finally, the front of the rectum, and is continued on to the upper ends

Sphenopetrosal fissure

The sphenopetrosal fissure is the cranial suture between the sphenoid bone and the petrous portion of the temporal bone

Posterior intermuscular septum of leg

The posterior intermuscular septum of leg, or posterior crural intermuscular septum is a band of fascia which separates the lateral compartment of leg

Tectorial membrane of atlanto-axial joint

The tectorial membrane of atlanto-axial joint is situated within the vertebral canal

Plantar venous arch

The four plantar metatarsal veins run backward in the metatarsal spaces, communicate, by means of perforating veins, with the veins on the dorsum of the foot, and unite to form the plantar venous arch which lies alongside the plantar arterial arch

Anal sinuses

The anal sinuses are furrows in the anal canal, that separate the anal columns from one another. The anal sinuses end below in small valve-like folds, termed anal valves

Carel van der Merwe

Carel van der Merwe is a South African author, historian and businessman who writes in Afrikaans and English. He has been awarded a number of literary prizes for his fiction and non-fiction books