What is/are the types of fetal stem connective tissue?

A. mucus: Mucous membranes line body cavities that open to the exterior, such as the respiratory, digestive, and urogenital tracts. They contain goblet cells that secrete mucus.

B. synovial: Synovial membranes line joint cavities and produce synovial fluid, not found in the respiratory tract.

C. serous: Serous membranes line body cavities that do not open to the exterior (e.g., pleura, pericardium, peritoneum) and secrete a watery fluid, not mucus.

D. peritoneal: The peritoneal membrane is a type of serous membrane lining the abdominal cavity, not the respiratory tract.

A. stable; epithelium: Epithelium consists of labile cells, not stable ones. These cells divide frequently even without injury.

B. permanent; nervous: Nervous tissue is considered permanent, and neurons generally do not regenerate or undergo mitosis even after injury.

C. stable; liver: Stable cells do not divide under normal conditions but can be stimulated to divide after injury. Liver cells are a classic example.

D. permanent; liver: In The liver is capable of regeneration and therefore has stable, not permanent, cells.

E. labile; epithelium: This is a true match, but it does not answer the question asked. Labile cells divide regularly and are not "usually non-mitotic" as the question specifies.