Definition

1. Noun:
   • A vein in the umbilical cord: The vena umbilicalis is a specific blood vessel. It is the vein within the umbilical cord that carries oxygenated, nutrient-rich blood from the placenta to the developing fetus.

Usage Notes

• The term is a formal, anatomical term used primarily in medical and biological contexts.
• In modern clinical English, it is more commonly referred to as the umbilical vein. is its Latin-derived scientific name.
• It is a singular noun. Its primary function is fetal circulation.

Examples of Usage

• Noun:
  • The vena umbilicalis is a critical component of the fetal circulatory system.
  • Oxygenated blood is transported via the vena umbilicalis from the placenta to the fetus.

Advanced Usage

• Embryonic Development: After birth, the closes off and becomes a fibrous cord known as the ligamentum teres hepatis (round ligament of the liver).
  • Following delivery, the vena umbilicalis undergoes physiological closure.

Variants and Related Words

• Umbilical vein (n): The common English term for .
• Umbilical cord (n): The structure containing the and umbilical arteries.
• Placenta (n): The organ from which the receives blood.
• Fetal circulation (n): The system in which the plays a key role.

Synonyms

• Umbilical vein: The direct and most frequently used synonym in non-specialist medical language.

Antonyms / Contrasting Terms

• Umbilical arteries (n): The two arteries within the umbilical cord that carry deoxygenated blood the fetus the placenta. They perform the opposite function of the .

Noun

1. a vein in the umbilical cord; returns nutrient blood from the placenta to the fetus