Definition

1. Noun:
   • A major embryonic vein: The common cardinal vein is a significant embryonic blood vessel that functions as a primary channel returning blood to the developing heart.
   • Formed by anastomosis: It is created by the joining (anastomosis) of two other embryonic veins: the anterior cardinal vein and the posterior cardinal vein.

Usage Examples

• Noun:
  • During early development, the common cardinal vein is crucial for returning blood from the body of the embryo to the heart.
  • The embryologist pointed out where the anterior and posterior cardinal veins fuse to form the common cardinal vein.

Advanced Usage

• Developmental context: The term is used almost exclusively in the fields of embryology, comparative anatomy, and medical education when describing the circulatory system of vertebrate embryos.
  • In the model, the common cardinal veins are shown draining into the sinus venosus of the primitive heart tube.

Variants and Related Words

• Anterior cardinal vein (n): The embryonic vein that drains blood from the head and anterior regions.
• Posterior cardinal vein (n): The embryonic vein that drains blood from the trunk and posterior regions.
• Duct of Cuvier: A synonym sometimes used, referring to the common cardinal vein, especially in lower vertebrates.

Synonyms

• Duct of Cuvier: (primarily in comparative anatomy/ichthyology)
• Common cardinal channel: (less common variant)

Notes on Meaning

• Specific to embryology: This term has a single, highly specific meaning within vertebrate developmental biology. It does not refer to veins in the adult human body, as this structure is transient and gives rise to parts of the adult venous system (like the superior vena cava).

Noun

1. the major return channels to the heart; formed by anastomosis of the anterior and posterior cardinal veins