lesser omentum, mesocolon, mesentery and mesosigmoid all are two layers of serous peritoneum.

Falciform attaches inferior surface of liver to anterior abdominal wall.

Kidneys are in peritoeal cavity not in abdominal cavity.

Pancreas is in both abdominal cavity and peritoneal cavity.

Peritoneum is a mucus tissue with two visceral and parietal layers.