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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 ...
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 ...
The breast is also called the mammary region, the armpit as the axilla and axillary, and the navel as the umbilicus and umbilical. The pelvis is the lower torso, between the abdomen and the thighs . The groin , where the thigh joins the trunk, are the inguen and inguinal area.
The amniotic sac and its filling provide a liquid that surrounds and cushions the fetus. It is a site of exchange of essential substances, such as oxygen, between the umbilical cord and the fetus. [9] It allows the fetus to move freely within the walls of the uterus. [citation needed] Buoyancy is also provided.
This fluid serves as a cushion for the growing fetus, but also serves to facilitate the exchange of nutrients, water, and biochemical products between mother and fetus. For humans, the amniotic fluid is commonly called water or waters (Latin liquor amnii ).
Umbilicus rupestris, the navelwort, [1] penny-pies or wall pennywort, is a fleshy, perennial, edible flowering plant in the stonecrop family Crassulaceae in the genus Umbilicus so named for its umbilicate (navel-like) leaves.
Rimate – Provided with a very small hole or crack, as some snails in which the umbilicus is very narrowly open. [1] Roundly lunate – Rounder than lunate (which see). [1] Rostriform – In the form of a rostrum. [1] Rudimentary – Not fully formed; imperfect. [1] Rugose – Rough or wrinkled, as parts of some shells. [1]