Groove for vena cava

The groove for the caudal vena cava (caval groove; sulcus venae cavae) is a longitudinal depression on the diaphragmatic surface of the liver that accommodates the caudal vena cava. The presence, depth, and prominence of this groove vary among domestic animal species.

Species-specific Descriptions

Dog

• The groove is deep and well-defined.

• Located on the dorsomedial surface of the liver, especially adjacent to the caudate lobe.

• The caudate process of the caudate lobe partially encloses the vena cava.

• This feature makes the liver and vena cava closely adherent.

Cat

• Similar to the dog but the groove is more shallow.

• The caudate process may still partly surround the vena cava.

Ox (Bovine)

• The groove is shallow or poorly developed.

• The liver is more compact and lies mainly on the right side.

• The caudal vena cava is in contact with the liver but not deeply embedded.

Horse

• The groove is typically absent or very shallow.

• The vena cava passes dorsal to the liver without forming a significant depression.

• The liver's undivided structure contributes to the lack of distinct grooving.

Pig

• The groove is well-formed and prominent.

• The caudate lobe is large and helps define the groove.

• The vena cava fits securely in the groove.

Sheep and Goat

• Groove is shallow or absent, similar to the ox.

• The caudal vena cava lies adjacent to but not embedded in the liver tissue.