Definition

1. Noun:
   • A very small vein: A "venule" is a minute blood vessel that collects blood from capillaries and transports it to larger veins. It is part of the microcirculatory system, forming a bridge between capillaries and veins.

Examples of Usage

• Noun:
  • Oxygen-depleted blood flows from the capillary into the venule.
  • The inflammation caused the venules in the area to become more visible.
  • Under the microscope, we could observe the network of arterioles, capillaries, and venules.

Advanced Usage

• Postcapillary venule: A specific type of venule that directly receives blood from capillaries and is often a site for white blood cell migration during immune responses.
  • Leukocytes adhere to the walls of postcapillary venules before moving into the surrounding tissue.

Variants and Related Words

• Venous (adj): Relating to or contained in veins.
  • Venous blood is typically darker red than arterial blood.
• Venation (n): The arrangement of veins in a leaf or an insect's wing.
  • Botanists study leaf venation patterns for classification.

Synonyms

• Venule is a specific anatomical term. Near-synonyms in a broader sense include:
  • Small vein: A less technical term for a minor blood vessel returning blood to the heart.
  • Minute vein: Emphasizes the extremely small size.

Notes on Meaning

• The term "venule" is primarily used in medical, biological, and anatomical contexts. It is not typically used in everyday conversation. Its core meaning is consistently that of a small venous vessel, as distinguished from the larger "vein" and the even smaller "capillary."

Noun

1. a minute vein continuous with a capillary