Navel string, also commonly referred to as umbilical cord, is a flexible cord-like structure that connects a developing fetus to the placenta in the womb of a pregnant mammal. It serves as a vital lifeline for the growing embryo, providing essential nutrients, oxygen, and waste removal throughout the gestation period.
The navel string is composed of three blood vessels, namely two smaller arteries carrying deoxygenated blood and one larger vein that transports oxygenated blood back and forth between the fetus and the placenta. These vessels are surrounded and protected by a gelatinous substance called Wharton's jelly, which provides structural support to prevent compression and maintain consistent blood flow.
At the time of birth, the navel string is typically clamped and cut close to the newborn's abdomen, leaving a small stump. Over the following weeks, the stump naturally dries up and eventually falls off, leaving a small scar commonly known as the belly button or navel.
In some cultures, the navel string holds symbolic significance and is often ceremonially preserved or discarded in a specific manner. Medically, the condition of the navel string is also closely monitored during pregnancy, labor, and delivery to ensure the healthy development and well-being of both mother and child.
Overall, the navel string plays a crucial role in fetal development by facilitating the exchange of vital nutrients and waste products between the fetus and the placenta until childbirth, where it transitions into a belly button, leaving a gentle reminder of the unique bond shared between mother and child.
The word "navel string" is a common term used to refer to the umbilical cord, which connects a fetus to its mother's placenta in the womb. The term is a combination of two words: "navel" and "string".
- "Navel" comes from the Old English word "navel", which is derived from the Latin term "umbilicus". This Latin root "umbilicus" refers specifically to the navel, or belly button. The word "umbilicus" itself is of unknown origin.
- "String" comes from the Old English word "streng", meaning "line" or "cord". It is also related to the Old Norse word "strengir", meaning "string" or "rope".