Which organ is indicated by swelling and turning green when exposed to air in severe Lantana toxicity?

In cases of severe Lantana toxicity, the organ that typically presents with swelling and a greenish discoloration when exposed to air is the liver. The liver is particularly vulnerable to toxins like those found in Lantana, leading to significant hepatocellular damage. This damage can result in hepatic necrosis and a characteristic change in coloration due to the breakdown of hemoglobin and other cellular components.

The green coloration is associated with the accumulation of bile pigments and other liver enzymes spilling into the tissue as a result of cell death. The liver's critical functions in metabolism, detoxification, and synthesis of proteins make it a central organ affected by these toxins, highlighting its importance in cases of poisoning.

Understanding the pathophysiology of Lantana toxicity reveals the liver's role in detoxifying harmful substances, which explains why it reacts so dramatically when overwhelmed by toxins, resulting in the observed symptoms.