Oval cells are seen in the stem cells of
**Core Concept**
Oval cells are a type of liver progenitor cell or hepatic stem cell that play a crucial role in liver regeneration and repair. These cells are capable of differentiating into both hepatocytes and bile duct cells, making them essential for maintaining liver function.
**Why the Correct Answer is Right**
During liver injury, oval cells are activated from their quiescent state and proliferate to replace damaged hepatocytes and bile duct cells. This process is mediated by various growth factors, including hepatocyte growth factor (HGF) and epidermal growth factor (EGF). Oval cells express specific markers, such as alpha-fetoprotein (AFP) and cytokeratin 19 (CK19), which distinguish them from mature hepatocytes and bile duct cells.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because oval cells are not typically associated with the pancreas, which has its own distinct progenitor cell populations.
**Option B:** This option is incorrect because oval cells are not a type of fibroblast, which is a different cell lineage involved in wound healing and tissue repair.
**Option C:** This option is incorrect because oval cells are not a type of adipocyte, which is a cell involved in fat storage and metabolism.
**Clinical Pearl / High-Yield Fact**
Oval cells are an important area of research for developing new therapies for liver diseases, including cirrhosis and liver cancer. Understanding the biology of oval cells can also inform strategies for promoting liver regeneration and repair in patients with liver injury.
**Correct Answer:** C.