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The umbilicus soli is located under the center of the cross (line D-U) Umbilicus soli (the "ground navel") was the name for the reference point of the Roman surveying tool, the groma , located at the moving end of a swinging arm, with a plumb bob suspended underneath.
Umbilicus may refer to: The navel or belly button; Umbilicus (mollusc), a feature of gastropod, Nautilus and Ammonite shell anatomy; Umbilicus, a genus of over ninety species of perennial flowering plants; Umbilicus urbis Romae, the designated center of the city of Rome from which and to which all distances in Rome and the Roman Empire were ...
Anatomical structures are often described in relation to landmarks, such as the umbilicus, sternum, or anatomical lines like the midclavicular line (from the center of the clavicle). The term cephalon or cephalic region refers to the head, which is further divided into the cranium (skull), facies (face), frons (forehead), oculus (eye area ...
the umbilical region is located around the navel; the coxal region encompassing the lateral (side) of hips; the pubic region encompassing the area above the genitals. The pelvis and legs contain, from superior to inferior, the inguinal or groin region between the thigh and the abdomen, the pubic region surrounding the genitals,
The umbilical region is one of the nine regions of the abdomen. It is the region that surrounds the area around the umbilicus and is placed approximately halfway between the xiphoid process and the pubic symphysis .
Surrounding the umbilical collar is the periumbilical skin. Directly behind the navel is a thick fibrous cord formed from the umbilical cord, called the urachus, which originates from the bladder. [5] The belly button is unique to each individual due to it being a scar, and various general forms have been classified by medical practitioners.
In placental mammals, the umbilical cord (also called the navel string, [1] birth cord or funiculus umbilicalis) is a conduit between the developing embryo or fetus and the placenta. During prenatal development , the umbilical cord is physiologically and genetically part of the fetus and (in humans) normally contains two arteries (the umbilical ...
In species with a wide, open umbilicus, such as the heath snail (Helicella itala), the spiral of the whorls can be clearly viewed by looking into the umbilicus. An umbilicus can vary from very narrow and punctured, as found in Petasina unidentata, to wide and shallow, such as the deep and wide depression in the rounded snail (Discus rotundatus ...