In which of the following organ is the Glisson's capsule is present?

Question

Accepted Answer

The correct option is 1: Liver

Glisson's capsule is a distinctive anatomical structure that is absolutely unique to the **Liver**. It is a smooth, thin layer of fibrous connective tissue that envelops the entire surface of the liver, covering the organ's external layer of peritoneum. However, its significance goes beyond a simple external covering; this fibrous tissue extends inward at the hilum (porta hepatis), accompanying the branches of the portal vein, hepatic artery, and bile ducts throughout the substance of the liver. This internal extension forms a network of sheaths that surround the hepatic lobules, providing structural support and protection for the delicate vascular and biliary systems of the organ. Glisson's capsule is an important landmark for surgeons and pathologists alike, as its inflammation (capsulitis) or stretching, particularly during rapid liver swelling (such as in acute hepatitis), can cause significant pain due to the richness of sensory nerve endings within the capsule. Its presence is the definitive characteristic used to identify the liver histologically in terms of its connective tissue framework.

The incorrect option is 2: Lungs

The Lungs are not encased by Glisson's capsule. Instead, the lungs are covered by a double-layered serous membrane known as the **pleura**. The visceral pleura adheres tightly to the lung surface, while the parietal pleura lines the thoracic cavity. Between these two layers is the pleural cavity, which contains a thin layer of fluid that serves to lubric lubricate the surfaces and allow the lungs to expand and contract smoothly during respiration. This structure is fundamentally different from Glisson's capsule, both in its composition—being a serous membrane—and its primary function, which is to facilitate movement rather than provide a dense, vascular sheath. The histological framework and mechanical requirements of the lungs necessitate the pleral system, not a fibrous capsule like Glisson's.

The incorrect option is 3: Pancreas

The **Pancreas** does not possess Glisson's capsule. This organ is classified as an retroperitoneal gland, meaning it lies behind the peritoneum. It is generally described as having a very thin, indistinct, and incomplete fibrous connective tissue sheath, which is often continuous with the surrounding loose connective tissue of the abdominal cavity. The functional tissue of the pancreas, composed of both exocrine acini (for digestive enzymes) and endocrine islets of Langerhans (for hormones like insulin and glucagon), is instead organized and supported by septa of loose connective tissue that emerge from this delicate external covering. Therefore, the pancreas lacks the thick, distinct, and deeply penetrating fibrous structure known as Glisson's capsule.

The incorrect option is 4: Kidney

The **Kidney** is encased in a protective layer, but it is called the **renal capsule**, not Glisson's capsule. The renal capsule is a tough, fibrous membrane that closely adheres to the kidney's surface, providing a robust physical barrier against infection and trauma. This capsule is surrounded by a thick layer of perirenal fat, which offers additional cushioning. While both Glisson's capsule and the renal capsule are fibrous coverings, the term Glisson's capsule is a historical and specific anatomical term reserved exclusively for the liver. The internal connective tissue arrangement of the kidney, which organizes the cortex and medulla, is structurally and functionally distinct from the sheathing network found in the liver.