Directly behind the navel (belly button) lies a thick, fibrous cord, primarily the remnant of the umbilical cord, and the urachus which connects to the bladder.
Detailed Explanation
The navel, or belly button, is essentially a scar that remains after the umbilical cord is cut following birth. What lies directly behind it is more interesting:
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Umbilical Cord Remnant: The main structure behind the navel is the fibrous remnant of the umbilical cord. This cord was crucial during gestation, providing the fetus with oxygen and nutrients from the mother, and removing waste products. After birth, its function is no longer needed, and it is clamped and cut. The remaining tissue eventually scars over to form the navel.
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Urachus: Another important structure is the urachus. This is a fibrous cord that connects the bladder to the umbilical cord during fetal development. It typically closes off before birth. However, in some cases, it may remain partially or completely open, which can lead to medical issues.
Navel Variations
It's worth noting that the appearance of the navel – whether it's an "innie" or an "outie" – is simply determined by how the skin heals after the umbilical cord is cut. The "type" of navel is not inherently linked to the underlying structures.
Medical Significance
While the navel itself is just a scar, the underlying structures, particularly the urachus, can sometimes be a site of medical problems. A patent (open) urachus can lead to infections or other complications.
In summary, the navel isn't just an empty hole; it's a point where vital structures connected during fetal development.
