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  2. Umbilical ring - Wikipedia

    en.wikipedia.org/wiki/Umbilical_ring

    The umbilical ring is a dense fibrous ring surrounding the umbilicus at birth. [1] At about the sixth week of embryological development , the midgut herniates through the umbilical ring; six weeks later it returns to the abdominal cavity and rotates around the superior mesenteric artery .

  3. Navel - Wikipedia

    en.wikipedia.org/wiki/Navel

    Parts of the adult navel include the "umbilical cord remnant" or "umbilical tip", which is the often protruding scar left by the detachment of the umbilical cord. This is located in the center of the navel, sometimes described as the belly button. Around the cord remnant is the "umbilical collar", formed by the dense fibrous umbilical ring ...

  4. Connecting stalk - Wikipedia

    en.wikipedia.org/wiki/Connecting_stalk

    The amniotic membrane and its contents form the umbilical cord that connects the embryo and the placenta. [3] [4] The root of the connecting stalk contains the allantois as a diverticulum of hindgut endoderm along with umbilical vessels. [5] [2] Anomalies are usually referred to as body stalk anomalies and occur in approximately 1 in 15,000 ...

  5. Linea alba (abdomen) - Wikipedia

    en.wikipedia.org/wiki/Linea_alba_(abdomen)

    The umbilicus (navel) is a defect in the linea alba through which foetal umbilical vessels pass before birth. [1] ... "Anatomy diagram: 03281.000-2".

  6. Circumvallate placenta - Wikipedia

    en.wikipedia.org/wiki/Circumvallate_placenta

    This thick ring of membranes is composed of a double fold of amnion and chorion with degenerated decidua vera and fibrin in between. Blood vessels, supplying nutrients and carrying waste products to and from the developing fetus, radiate from the umbilical cord insertion to as far as the ring of membranes, and then disappears from view. [4]

  7. Transumbilical plane - Wikipedia

    en.wikipedia.org/wiki/Transumbilical_plane

    The transumbilical plane or umbilical plane, one of the transverse planes in human anatomy, is a horizontal line that passes through the abdomen at the level of the navel (or umbilicus). In physical examination, clinicians use the transumbilical plane and its intersection with the median plane to divide the abdomen into four quadrants.

  8. Yolk sac - Wikipedia

    en.wikipedia.org/wiki/Yolk_sac

    The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast layer of the bilaminar embryonic disc.This is alternatively called the umbilical vesicle by the Terminologia Embryologica (TE), though yolk sac is far more widely used.

  9. Umbilical region - Wikipedia

    en.wikipedia.org/wiki/Umbilical_region

    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 .

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